90902475 has 18 divisors (see below), whose sum is σ = 162816836. Its totient is φ = 48481200.

The previous prime is 90902467. The next prime is 90902477. The reversal of 90902475 is 57420909.

It is not a de Polignac number, because 90902475 - 2³ = 90902467 is a prime.

It is a super-2 number, since 2×90902475² = 16526519922251250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90902477) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 201781 + ... + 202230.

Almost surely, 2^90902475 is an apocalyptic number.

90902475 is a deficient number, since it is larger than the sum of its proper divisors (71914361).

90902475 is a wasteful number, since it uses less digits than its factorization.

90902475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404027 (or 404019 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 90902475 is about 9534.2789449439. The cubic root of 90902475 is about 449.6334051364.

The spelling of 90902475 in words is "ninety million, nine hundred two thousand, four hundred seventy-five".