87997156 has 12 divisors (see below), whose sum is σ = 165840892. Its totient is φ = 40614048.

The previous prime is 87997109. The next prime is 87997199. The reversal of 87997156 is 65179978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26625600 + 61371556 = 5160^2 + 7834^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 1692253 = 87997156 / (8 + 7 + 9 + 9 + 7 + 1 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846075 + ... + 846178.

Almost surely, 2^87997156 is an apocalyptic number.

It is an amenable number.

87997156 is a deficient number, since it is larger than the sum of its proper divisors (77843736).

87997156 is a wasteful number, since it uses less digits than its factorization.

87997156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692270 (or 1692268 counting only the distinct ones).

The product of its digits is 952560, while the sum is 52.

The square root of 87997156 is about 9380.6799327128. The cubic root of 87997156 is about 444.7912263960.

The spelling of 87997156 in words is "eighty-seven million, nine hundred ninety-seven thousand, one hundred fifty-six".