90688973931 has 6 divisors (see below), whose sum is σ = 130995184580. Its totient is φ = 60459315948.

The previous prime is 90688973909. The next prime is 90688973983. The reversal of 90688973931 is 13937988609.

It is not a de Polignac number, because 90688973931 - 2¹³ = 90688965739 is a prime.

It is a super-2 number, since 2×90688973931² (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 (90688978931) 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 5 ways as a sum of consecutive naturals, for example, 5038276321 + ... + 5038276338.

Almost surely, 2^90688973931 is an apocalyptic number.

90688973931 is a deficient number, since it is larger than the sum of its proper divisors (40306210649).

90688973931 is a wasteful number, since it uses less digits than its factorization.

90688973931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076552665 (or 10076552662 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 90688973931 in words is "ninety billion, six hundred eighty-eight million, nine hundred seventy-three thousand, nine hundred thirty-one".