89855431 has 2 divisors, whose sum is σ = 89855432. Its totient is φ = 89855430.

The previous prime is 89855413. The next prime is 89855461. The reversal of 89855431 is 13455898.

Together with previous prime (89855413) 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 a de Polignac number, because none of the positive numbers 2^k-89855431 is a prime.

It is a super-2 number, since 2×89855431² = 16147996960391522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89855461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44927715 + 44927716.

It is an arithmetic number, because the mean of its divisors is an integer number (44927716).

Almost surely, 2^89855431 is an apocalyptic number.

89855431 is a deficient number, since it is larger than the sum of its proper divisors (1).

89855431 is an equidigital number, since it uses as much as digits as its factorization.

89855431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 89855431 is about 9479.2104629025. The cubic root of 89855431 is about 447.9003933928.

The spelling of 89855431 in words is "eighty-nine million, eight hundred fifty-five thousand, four hundred thirty-one".