87031725 has 96 divisors (see below), whose sum is σ = 167989248. Its totient is φ = 39360000.

The previous prime is 87031691. The next prime is 87031741. The reversal of 87031725 is 52713078.

It is not a de Polignac number, because 87031725 - 2⁷ = 87031597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1048534 + ... + 1048616.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^87031725 is an apocalyptic number.

It is an amenable number.

87031725 is a deficient number, since it is larger than the sum of its proper divisors (80957523).

87031725 is a wasteful number, since it uses less digits than its factorization.

87031725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 87031725 is about 9329.0795365888. The cubic root of 87031725 is about 443.1586157717.

The spelling of 87031725 in words is "eighty-seven million, thirty-one thousand, seven hundred twenty-five".