87566039 has 4 divisors (see below), whose sum is σ = 95526600. Its totient is φ = 79605480.

The previous prime is 87565999. The next prime is 87566047. The reversal of 87566039 is 93066578.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87566039 - 2⁸ = 87565783 is a prime.

It is a super-2 number, since 2×87566039² = 15335622372299042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87566069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980264 + ... + 3980285.

It is an arithmetic number, because the mean of its divisors is an integer number (23881650).

Almost surely, 2^87566039 is an apocalyptic number.

87566039 is a deficient number, since it is larger than the sum of its proper divisors (7960561).

87566039 is a wasteful number, since it uses less digits than its factorization.

87566039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7960560.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 87566039 is about 9357.6727341792. The cubic root of 87566039 is about 444.0636609608.

The spelling of 87566039 in words is "eighty-seven million, five hundred sixty-six thousand, thirty-nine".