89989431 has 12 divisors (see below), whose sum is σ = 139575672. Its totient is φ = 51422448.

The previous prime is 89989421. The next prime is 89989441. The reversal of 89989431 is 13498998.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (89989421) and next prime (89989441).

It is not a de Polignac number, because 89989431 - 2⁹ = 89988919 is a prime.

It is a super-2 number, since 2×89989431² = 16196195383407522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89989421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305940 + ... + 306233.

It is an arithmetic number, because the mean of its divisors is an integer number (11631306).

Almost surely, 2^89989431 is an apocalyptic number.

89989431 is a deficient number, since it is larger than the sum of its proper divisors (49586241).

89989431 is a wasteful number, since it uses less digits than its factorization.

89989431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612190 (or 612183 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 89989431 is about 9486.2759289407. The cubic root of 89989431 is about 448.1229317591.

The spelling of 89989431 in words is "eighty-nine million, nine hundred eighty-nine thousand, four hundred thirty-one".