89921431 has 4 divisors (see below), whose sum is σ = 93022200. Its totient is φ = 86820664.

The previous prime is 89921423. The next prime is 89921459. The reversal of 89921431 is 13412998.

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

It is not a de Polignac number, because 89921431 - 2³ = 89921423 is a prime.

It is a super-2 number, since 2×89921431² = 16171727506175522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89921401) 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, 1550341 + ... + 1550398.

It is an arithmetic number, because the mean of its divisors is an integer number (23255550).

Almost surely, 2^89921431 is an apocalyptic number.

89921431 is a deficient number, since it is larger than the sum of its proper divisors (3100769).

89921431 is a wasteful number, since it uses less digits than its factorization.

89921431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100768.

The product of its digits is 15552, while the sum is 37.

The square root of 89921431 is about 9482.6911264683. The cubic root of 89921431 is about 448.0100294709.

The spelling of 89921431 in words is "eighty-nine million, nine hundred twenty-one thousand, four hundred thirty-one".