87664904 has 8 divisors (see below), whose sum is σ = 164371710. Its totient is φ = 43832448.

The previous prime is 87664901. The next prime is 87664919. The reversal of 87664904 is 40946678.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 8988004 = 8870^2 + 2998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (87664901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5479049 + ... + 5479064.

Almost surely, 2^87664904 is an apocalyptic number.

It is an amenable number.

87664904 is a deficient number, since it is larger than the sum of its proper divisors (76706806).

87664904 is a wasteful number, since it uses less digits than its factorization.

87664904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958119 (or 10958115 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 87664904 is about 9362.9538074264. The cubic root of 87664904 is about 444.2307190360.

The spelling of 87664904 in words is "eighty-seven million, six hundred sixty-four thousand, nine hundred four".