90725525 has 24 divisors (see below), whose sum is σ = 123501024. Its totient is φ = 65566400.

The previous prime is 90725521. The next prime is 90725527. The reversal of 90725525 is 52552709.

It is not a de Polignac number, because 90725525 - 2² = 90725521 is a prime.

It is a super-2 number, since 2×90725525² = 16462241773051250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (90725521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46622 + ... + 48528.

It is an arithmetic number, because the mean of its divisors is an integer number (5145876).

Almost surely, 2^90725525 is an apocalyptic number.

It is an amenable number.

90725525 is a deficient number, since it is larger than the sum of its proper divisors (32775499).

90725525 is a wasteful number, since it uses less digits than its factorization.

90725525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 90725525 is about 9524.9947506547. The cubic root of 90725525 is about 449.3414647455.

The spelling of 90725525 in words is "ninety million, seven hundred twenty-five thousand, five hundred twenty-five".