27 (NUMBER)

'27' ('twenty-seven') is the natural number following 26 and preceding 28. Twenty-seven is the smallest positive integer requiring four syllables to name in English, though it can be unambiguously defined in just two: "three cubed."

Cardinal	27 twenty-seven
Ordinal	27th twenty-seventh
Factorization	$3^3\; ,!$
Divisors	1, 3, 9, 27
Roman numeral	XXVII
Acrophonic Greek numeral	ΔΔΠΙΙ
Alphabetic Greek numeral	κζ´
Hebrew numeral	כז
Chinese numeral	二十七
Financial Chinese numeral	貳拾柒
Arabic numeral
Binary (2)	11011
Negabinary (-2)	1101111
Ternary (3)	1000
Balanced ternary (-0+)	1000
Negaternary (-3)	12000
Quaternary (4)	123
Quinary (5)	102
Senary (6)	43
Septenary (7)	36
Octal (8)	33
Nonary (9)	30
Decimal (10)	27
Undecimal (11)	25
Duodecimal (12)	23
Tridecimal (13)	21
Hexadecimal (16)	1B
Vigesimal (20)	17
Quadrovigesimal (24)	13
Septemvigesimal (27)	10
Trigesimal (30)	R
Hexatridecimal (36)	R
Phinary (φ)	1010010.010101 111101.10111111

Contents

In mathematics

In science

Astronomy

In religion

In music

In other fields

Historical years

References

In mathematics

Twenty-seven is a perfect cube, being 3³ = 3 × 3 × 3. 27 is 3↑↑2 (using Knuth's up-arrow notation). There are exactly 27 straight lines on a cubic surface. 27 is also a decagonal number.
In base 10, it is the first composite number not evenly divisible by any of its digits. It is the radix (base) of the septemvigesimal positional numeral system.
In a prime reciprocal magic square of the multiples of 1/7, the magic constant is 27.
It is the twenty-eighth (and twenty-ninth) digit in π. (3.141592653589793238462643383'27'9...).
: ''If you start counting with 0 it is considered one of few Self-Locating strings in pi.''
In base 10, it is a Smith number and a Harshad number.
The unique simple formally real Jordan algebra, the exceptional Jordan algebra of self-adjoint 3 by 3 matrices of quaternions, is 27-dimensional.
In the Collatz conjecture (aka the "3''n'' + 1 conjecture") a starting value of 27 requires 112 steps to reach 1, many more than any lower number.

In science

★ The atomic number of cobalt.

Astronomy

★ The Messier object M27, a magnitude 7.5 planetary nebula in the constellation Vulpecula, also known as the Dumbbell Nebula.

★ The New General Catalogue object NGC 27, a spiral galaxy in the constellation Andromeda

★ The Saros number of the solar eclipse series which began on -1993 March 9 and ended on -713 April 16. The duration of Saros series 27 was 1280.1 years, and it contained 72 solar eclipses. Further, the Saros number of the lunar eclipse series which began on -1944 July 17 and ended on -411 January 23. The duration of Saros series 27 was 1532.5 years, and it contained 86 lunar eclipses.

★ The 27th moon of Jupiter is Sinope.

★ Uranus has 27 moons

In religion

★ There are a total of 27 books in the New Testament

In music

★ 27 is the name of a Boston-based pop band.

★ The number of completed, numbered piano concertos by Wolfgang Amadeus Mozart and his birthday.

★ The age in years at which many famous rock/blues musicians died, sometimes referred to as the 27 Club, which includes Robert Johnson, Brian Jones, Janis Joplin, Jimi Hendrix, Jim Morrison, Chris Bell, D. Boon, Rodrigo Bueno and Kurt Cobain. Occasionally, this is termed the "ideal" age to die, and the concept has inspired a brand of clothing, ''DeadAt27''

★ A number which American parodist "Weird Al" Yankovic hides somewhere in many of his songs and videos. [1]

★ The number of "8 by 10 color glossy photographs with circles and arrows" in the song Alice's Restaurant by Arlo Guthrie

★ In the song "The Ex" by Billy Talent off of their self-titled album, Ben says "So i sat in my room for 27 days, no she never called, i had something to say"

★ The punk rock band Lagwagon has a song entitled ''Twenty Seven'' on their album Double Plaidinum.

★ The punk rock band Pinhead Gunpowder released a song entitled ''27'' on their album Shoot the Moon.

★ The number 27 is featured in many song lyrics and titles penned by Ben Weasel, in his bands Screeching Weasel and The Riverdales.

★ The number 27 is known as the East Bay Punk scene's number.

★ The punk band The Adicts use the number 27 in many song lyrics and released an album entitled "27"

★ "27" is name of a song by Scottish band Biffy Clyro from their 2002 album, ''Blackened Sky''.

In other fields

'Twenty-seven' is also:

★ Gilles Villeneuve's famous Ferrari number now adopted by his son, Forumula 1 World Champion Jacques Villeneuve in his NASCAR debut.

★ Vladimir Guerrero's jersey number from the American League baseball team, the Los Angeles Angels of Anaheim.

★ The total number of letters in the Hebrew alphabet (22 regular letters and 5 final consonants)

★ The number of letters in the Spanish alphabet

★ Rusty Wallace's car number when he won the 1989 NASCAR Winston Cup championship.

★ The number most commonly associated with F1 driver Gilles Villeneuve

★ The current number of Amendments to the United States Constitution.

★ The modal age of the peak performance year for major league baseball position players, according to a commonly accepted theory by sabermetrician Bill James

★ The code for international direct-dial phone calls to South Africa

★ With the number 37, a key number in comedian Charles Fleischer's concept of moleeds

★ The designation (I-27) of a US interstate highway in Texas

★ The designation (US 27) of a United States national highway from Fort Wayne, Indiana to Miami, Florida

★ The name of a popular cigarette, Marlboro Blend No. 27

★ The number of books in the first Xanth "trilogy"

★ The number of outs in a regulation Professional baseball game.

★ "The Bankers Case" on the U.S. Version of Deal or No Deal

★ Among the Blue Man Group fan community, the 27th of every month is known as "Blue Man Day," because the shade of blue that Blue Man Group uses is cobalt, and cobalt is the 27th element in the Periodic Table, as mentioned above.

Historical years

27 A.D., 27 B.C., 1927, 2027, etc.

References

★ Mystery of the number 27 - Large collection of 27 related trivia and facts.

★ Prime Curios! 27 from the Prime Pages