90638525 has 12 divisors (see below), whose sum is σ = 112716000. Its totient is φ = 72301680.

The previous prime is 90638521. The next prime is 90638549. The reversal of 90638525 is 52583609.

It is not a de Polignac number, because 90638525 - 2² = 90638521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90638521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3926 + ... + 14024.

It is an arithmetic number, because the mean of its divisors is an integer number (9393000).

Almost surely, 2^90638525 is an apocalyptic number.

It is an amenable number.

90638525 is a deficient number, since it is larger than the sum of its proper divisors (22077475).

90638525 is a wasteful number, since it uses less digits than its factorization.

90638525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10468 (or 10463 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 90638525 is about 9520.4267236296. The cubic root of 90638525 is about 449.1977888619.

The spelling of 90638525 in words is "ninety million, six hundred thirty-eight thousand, five hundred twenty-five".