87997164 has 24 divisors (see below), whose sum is σ = 205625280. Its totient is φ = 29289744.

The previous prime is 87997109. The next prime is 87997199. The reversal of 87997164 is 46179978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3907 + ... + 13829.

It is an arithmetic number, because the mean of its divisors is an integer number (8567720).

Almost surely, 2^87997164 is an apocalyptic number.

It is an amenable number.

87997164 is an abundant number, since it is smaller than the sum of its proper divisors (117628116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87997164 is a wasteful number, since it uses less digits than its factorization.

87997164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669 (or 10667 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 87997164 is about 9380.6803591211. The cubic root of 87997164 is about 444.7912398750.

The spelling of 87997164 in words is "eighty-seven million, nine hundred ninety-seven thousand, one hundred sixty-four".