90404929131 has 64 divisors (see below), whose sum is σ = 137249842176. Its totient is φ = 52445836800.

The previous prime is 90404929123. The next prime is 90404929189. The reversal of 90404929131 is 13192940409.

It is not a de Polignac number, because 90404929131 - 2³ = 90404929123 is a prime.

It is a super-2 number, since 2×90404929131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90404929631) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56608425 + ... + 56610021.

It is an arithmetic number, because the mean of its divisors is an integer number (2144528784).

Almost surely, 2^90404929131 is an apocalyptic number.

90404929131 is a deficient number, since it is larger than the sum of its proper divisors (46844913045).

90404929131 is a wasteful number, since it uses less digits than its factorization.

90404929131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 90404929131 in words is "ninety billion, four hundred four million, nine hundred twenty-nine thousand, one hundred thirty-one".