1987 is thenatural number following 1986 and preceding 1988.

1987 is anodd number and the 300thprime number. It is the first number of asexy prime triplet (1987, 1993, 1999). Being of the form 4n + 3, it is aGaussian prime. It is alucky number and therefore also a lucky prime. 1987 is aprime factor of the 9th number inSylvester's sequence, and is the 15th prime to divide any number in the sequence.

There are 1987polyiamonds with 12 cells that tile the planeisohedrally.^[1]

• There are 1987 ways to place four non-attackingchess kings on a 5 × 5 board.^[2]

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