87690025 has 6 divisors (see below), whose sum is σ = 108735662. Its totient is φ = 70152000.

The previous prime is 87690017. The next prime is 87690049. The reversal of 87690025 is 52009678.

It can be written as a sum of positive squares in 3 ways, for example, as 14227984 + 73462041 = 3772^2 + 8571^2 .

It is not a de Polignac number, because 87690025 - 2³ = 87690017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1753776 + ... + 1753825.

Almost surely, 2^87690025 is an apocalyptic number.

It is an amenable number.

87690025 is a deficient number, since it is larger than the sum of its proper divisors (21045637).

87690025 is a wasteful number, since it uses less digits than its factorization.

87690025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507611 (or 3507606 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 87690025 is about 9364.2952217452. The cubic root of 87690025 is about 444.2731474713.

The spelling of 87690025 in words is "eighty-seven million, six hundred ninety thousand, twenty-five".