87031775 has 12 divisors (see below), whose sum is σ = 108107664. Its totient is φ = 69504000.

The previous prime is 87031759. The next prime is 87031817. The reversal of 87031775 is 57713078.

It is not a de Polignac number, because 87031775 - 2⁴ = 87031759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13310 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (9008972).

Almost surely, 2^87031775 is an apocalyptic number.

87031775 is a deficient number, since it is larger than the sum of its proper divisors (21075889).

87031775 is a wasteful number, since it uses less digits than its factorization.

87031775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082 (or 6077 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 87031775 is about 9329.0822163812. The cubic root of 87031775 is about 443.1587006370.

The spelling of 87031775 in words is "eighty-seven million, thirty-one thousand, seven hundred seventy-five".