90539018 has 4 divisors (see below), whose sum is σ = 135808530. Its totient is φ = 45269508.

The previous prime is 90538979. The next prime is 90539021. The reversal of 90539018 is 81093509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 82319329 + 8219689 = 9073^2 + 2867^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22634753 + ... + 22634756.

Almost surely, 2^90539018 is an apocalyptic number.

90539018 is a deficient number, since it is larger than the sum of its proper divisors (45269512).

90539018 is a wasteful number, since it uses less digits than its factorization.

90539018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45269511.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 90539018 is about 9515.1993147805. The cubic root of 90539018 is about 449.0333455724.

The spelling of 90539018 in words is "ninety million, five hundred thirty-nine thousand, eighteen".