89231431 has 2 divisors, whose sum is σ = 89231432. Its totient is φ = 89231430.

The previous prime is 89231413. The next prime is 89231459. The reversal of 89231431 is 13413298.

Together with previous prime (89231413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89231431 - 2⁵ = 89231399 is a prime.

It is a super-2 number, since 2×89231431² = 15924496556615522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 89231393 and 89231402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89231411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44615715 + 44615716.

It is an arithmetic number, because the mean of its divisors is an integer number (44615716).

Almost surely, 2^89231431 is an apocalyptic number.

89231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

89231431 is an equidigital number, since it uses as much as digits as its factorization.

89231431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 89231431 is about 9446.2389870255. The cubic root of 89231431 is about 446.8611710132.

It can be divided in two parts, 892 and 31431, that added together give a palindrome (32323).

The spelling of 89231431 in words is "eighty-nine million, two hundred thirty-one thousand, four hundred thirty-one".