318987 has 18 divisors (see below), whose sum is σ = 488852. Its totient is φ = 200376.

The previous prime is 318979. The next prime is 319001. The reversal of 318987 is 789813.

It is not a de Polignac number, because 318987 - 2³ = 318979 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318987.

It is not an unprimeable number, because it can be changed into a prime (318907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4728 + ... + 4794.

2³¹⁸⁹⁸⁷ is an apocalyptic number.

318987 is a deficient number, since it is larger than the sum of its proper divisors (169865).

318987 is a wasteful number, since it uses less digits than its factorization.

318987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 93 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 318987 is about 564.7893412592. The cubic root of 318987 is about 68.3267863382.

The spelling of 318987 in words is "three hundred eighteen thousand, nine hundred eighty-seven".