90204507 has 12 divisors (see below), whose sum is σ = 131127360. Its totient is φ = 59752368.

The previous prime is 90204503. The next prime is 90204509. The reversal of 90204507 is 70540209.

It is not a de Polignac number, because 90204507 - 2² = 90204503 is a prime.

It is a super-2 number, since 2×90204507² = 16273706166226098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90204503) 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 11 ways as a sum of consecutive naturals, for example, 30507 + ... + 33332.

It is an arithmetic number, because the mean of its divisors is an integer number (10927280).

Almost surely, 2^90204507 is an apocalyptic number.

90204507 is a deficient number, since it is larger than the sum of its proper divisors (40922853).

90204507 is a wasteful number, since it uses less digits than its factorization.

90204507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64002 (or 63999 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 90204507 is about 9497.6053297660. The cubic root of 90204507 is about 448.4796544128.

The spelling of 90204507 in words is "ninety million, two hundred four thousand, five hundred seven".