87173764 has 12 divisors (see below), whose sum is σ = 155432844. Its totient is φ = 42764384.

The previous prime is 87173759. The next prime is 87173783. The reversal of 87173764 is 46737178.

It can be written as a sum of positive squares in 2 ways, for example, as 67371264 + 19802500 = 8208^2 + 4450^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87173764.

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, 205387 + ... + 205810.

It is an arithmetic number, because the mean of its divisors is an integer number (12952737).

Almost surely, 2^87173764 is an apocalyptic number.

It is an amenable number.

87173764 is a deficient number, since it is larger than the sum of its proper divisors (68259080).

87173764 is a wasteful number, since it uses less digits than its factorization.

87173764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411254 (or 411252 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The square root of 87173764 is about 9336.6891348058. The cubic root of 87173764 is about 443.3995684984.

The spelling of 87173764 in words is "eighty-seven million, one hundred seventy-three thousand, seven hundred sixty-four".