90812525 has 12 divisors (see below), whose sum is σ = 113704032. Its totient is φ = 71942640.

The previous prime is 90812509. The next prime is 90812531. The reversal of 90812525 is 52521809.

It is not a de Polignac number, because 90812525 - 2⁴ = 90812509 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90812491 and 90812500.

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, 15059 + ... + 20208.

It is an arithmetic number, because the mean of its divisors is an integer number (9475336).

Almost surely, 2^90812525 is an apocalyptic number.

It is an amenable number.

90812525 is a deficient number, since it is larger than the sum of its proper divisors (22891507).

90812525 is a wasteful number, since it uses less digits than its factorization.

90812525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35380 (or 35375 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 90812525 is about 9529.5605879810. The cubic root of 90812525 is about 449.4850488077.

The spelling of 90812525 in words is "ninety million, eight hundred twelve thousand, five hundred twenty-five".