108156987 has 12 divisors (see below), whose sum is σ = 164449480. Its totient is φ = 68309568.

The previous prime is 108156953. The next prime is 108157001. The reversal of 108156987 is 789651801.

108156987 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 569 + 87 = 666.

It is not a de Polignac number, because 108156987 - 2⁷ = 108156859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108156947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316078 + ... + 316419.

Almost surely, 2^108156987 is an apocalyptic number.

108156987 is a deficient number, since it is larger than the sum of its proper divisors (56292493).

108156987 is a wasteful number, since it uses less digits than its factorization.

108156987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632522 (or 632519 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 108156987 is about 10399.8551432219. The cubic root of 108156987 is about 476.4509458510.

The spelling of 108156987 in words is "one hundred eight million, one hundred fifty-six thousand, nine hundred eighty-seven".