89981931 has 8 divisors (see below), whose sum is σ = 129204880. Its totient is φ = 55373472.

The previous prime is 89981909. The next prime is 89981963. The reversal of 89981931 is 13918998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89981931 - 2⁷ = 89981803 is a prime.

It is a super-2 number, since 2×89981931² = 16193495812977522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89981981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153576 + ... + 1153653.

It is an arithmetic number, because the mean of its divisors is an integer number (16150610).

Almost surely, 2^89981931 is an apocalyptic number.

89981931 is a deficient number, since it is larger than the sum of its proper divisors (39222949).

89981931 is a wasteful number, since it uses less digits than its factorization.

89981931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307245.

The product of its digits is 139968, while the sum is 48.

The square root of 89981931 is about 9485.8806127845. The cubic root of 89981931 is about 448.1104820920.

The spelling of 89981931 in words is "eighty-nine million, nine hundred eighty-one thousand, nine hundred thirty-one".