← 1986 1987 Factorization 1987 | 1987 1988 → Prime yes | |
Cardinal one thousand nine hundred eighty-seven Ordinal 1987th
(one thousand nine hundred and eighty-seventh) | ||
1987 is the natural number following 1986 and preceding 1988.
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In mathematics
1987 is an odd number and the 300th prime number. It starts the sexy prime triplet (1987, 1993, 1999). Being of the form 4n + 3, it is a Gaussian prime. It is a lucky number and therefore also a lucky prime. 1987 is a prime factor of the 9th number in Sylvester's sequence, and is the 15th prime to divide any number in the sequence.
There are 1987 polyiamonds with 12 cells that tile the plane isohedrally.
In other fields
References
1987 (number) Wikipedia(Text) CC BY-SA