|Cardinal||one thousand nine hundred eighty-seven|
(one thousand nine hundred eighty-seventh)
1987 is the natural number following 1986 and preceding 1988.
1987 is an odd number and the 300th prime number. It is the first number of a 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.
In other fields
- UN 1987 is the UN number for the hazardous substance "Alcohols, N.O.S." (N.O.S. stands for not otherwise specified).
- There are 1987 ways to place four non-attacking chess kings on a 5 × 5 board.