From Wikipedia, the free encyclopedia 1987 (number)
1987 (number)
Cardinal one thousand nine hundred • NGC 1987 is a globular star cluster in the
[and] eighty-seven constellation Mensa.[2]
Ordinal 1987th (one thousand nine
hundred [and] eighty seventh) In entertainment
Factorization Prime • 1987 is the title of the European version of the album
Whitesnake by the British rock band Whitesnake.
Divisors 1
• 1987 (What the Fuck Is Going On?) is the debut album of
Roman numeral MCMLXXXVII the British band The Justified Ancients of Mu Mu
Binary 11111000011 (The JAMs: Bill Drummond and Jimmy Cauty).
• "1987" is the sixth episode of the second season of
Hexadecimal 7C3 the television comedy series Robot Chicken.
1987 is the natural number following 1986 and preceding
1988.
In other fields
• UN 1987 is the UN number for the hazardous
In mathematics substance "Alcohols, n.o.s." (n.o.s. stands for not
1987 is an odd number and the 300th prime number. It otherwise specified).[3]
starts the sexy prime triplet (1987, 1993, 1999). Being of • There are 1987 ways to place 4 nonattacking chess
the form 4n + 3, it is a Gaussian prime. It is a lucky num- kings on a 5 × 5 board.[4]
ber and therefore also a lucky prime. 1987 is a prime fac- • 1987 is the most recent year to have no repeating
tor of the 9th number in Sylvester’s sequence, and is the digits, the next being 2013
15th prime to divide any number in the sequence.
There are 1987 polyiamonds with 12 cells that tile the
plane isohedrally.[1]
References
[1] (sequence A075223 in OEIS).
[2] Hartmut Frommert, "NGC 1987".
In astronomy [3] National Oceanic and Atmospheric Administration,
• SN 1987A was a supernova first seen on February 23, "Chemical data sheet for: ALCOHOLS, N.O.S.".
1987. It was the closest observed supernova since [4] (sequence A061997 in OEIS).
1604.
• 1987 Kaplan is a main-belt asteroid discovered in
1952.
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Categories:
• Integers
• Number stubs
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