90557013 has 4 divisors (see below), whose sum is σ = 120742688. Its totient is φ = 60371340.

The previous prime is 90557009. The next prime is 90557029. The reversal of 90557013 is 31075509.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90557013 - 2² = 90557009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90557063) 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, 15092833 + ... + 15092838.

It is an arithmetic number, because the mean of its divisors is an integer number (30185672).

Almost surely, 2^90557013 is an apocalyptic number.

It is an amenable number.

90557013 is a deficient number, since it is larger than the sum of its proper divisors (30185675).

90557013 is a wasteful number, since it uses less digits than its factorization.

90557013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30185674.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 90557013 is about 9516.1448601837. The cubic root of 90557013 is about 449.0630926728.

The spelling of 90557013 in words is "ninety million, five hundred fifty-seven thousand, thirteen".