90123002131 has 4 divisors (see below), whose sum is σ = 94041393552. Its totient is φ = 86204610712.

The previous prime is 90123002113. The next prime is 90123002171. The reversal of 90123002131 is 13120032109.

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

It is a cyclic number.

It is not a de Polignac number, because 90123002131 - 2³⁵ = 55763263763 is a prime.

It is a super-2 number, since 2×90123002131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90123002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959195676 + ... + 1959195721.

It is an arithmetic number, because the mean of its divisors is an integer number (23510348388).

Almost surely, 2^90123002131 is an apocalyptic number.

90123002131 is a deficient number, since it is larger than the sum of its proper divisors (3918391421).

90123002131 is a wasteful number, since it uses less digits than its factorization.

90123002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918391420.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 90123002131 in words is "ninety billion, one hundred twenty-three million, two thousand, one hundred thirty-one".