90172825 has 12 divisors (see below), whose sum is σ = 112014160. Its totient is φ = 72009360.

The previous prime is 90172813. The next prime is 90172853. The reversal of 90172825 is 52827109.

It is not a de Polignac number, because 90172825 - 2⁷ = 90172697 is a prime.

It is a super-2 number, since 2×90172825² = 16262276736961250, which contains 22 as substring.

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, 12562 + ... + 18388.

Almost surely, 2^90172825 is an apocalyptic number.

It is an amenable number.

90172825 is a deficient number, since it is larger than the sum of its proper divisors (21841335).

90172825 is a wasteful number, since it uses less digits than its factorization.

90172825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456 (or 6451 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 90172825 is about 9495.9372891779. The cubic root of 90172825 is about 448.4271426382.

The spelling of 90172825 in words is "ninety million, one hundred seventy-two thousand, eight hundred twenty-five".