87311668 has 6 divisors (see below), whose sum is σ = 152795426. Its totient is φ = 43655832.

The previous prime is 87311659. The next prime is 87311687. The reversal of 87311668 is 86611378.

It can be written as a sum of positive squares in only one way, i.e., 54730404 + 32581264 = 7398^2 + 5708^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87311668.

It is a congruent number.

It is an unprimeable number.

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, 10913955 + ... + 10913962.

Almost surely, 2^87311668 is an apocalyptic number.

It is an amenable number.

87311668 is a deficient number, since it is larger than the sum of its proper divisors (65483758).

87311668 is a wasteful number, since it uses less digits than its factorization.

87311668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21827921 (or 21827919 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 87311668 is about 9344.0712754131. The cubic root of 87311668 is about 443.6332563884.

The spelling of 87311668 in words is "eighty-seven million, three hundred eleven thousand, six hundred sixty-eight".