90553431 has 4 divisors (see below), whose sum is σ = 120737912. Its totient is φ = 60368952.

The previous prime is 90553427. The next prime is 90553433. The reversal of 90553431 is 13435509.

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

It is not a de Polignac number, because 90553431 - 2² = 90553427 is a prime.

It is a super-2 number, since 2×90553431² = 16399847731743522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90553433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15092236 + ... + 15092241.

It is an arithmetic number, because the mean of its divisors is an integer number (30184478).

Almost surely, 2^90553431 is an apocalyptic number.

90553431 is a deficient number, since it is larger than the sum of its proper divisors (30184481).

90553431 is a wasteful number, since it uses less digits than its factorization.

90553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30184480.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 90553431 is about 9515.9566518559. The cubic root of 90553431 is about 449.0571716691.

The spelling of 90553431 in words is "ninety million, five hundred fifty-three thousand, four hundred thirty-one".