90951431 has 6 divisors (see below), whose sum is σ = 91689480. Its totient is φ = 90219276.

The previous prime is 90951403. The next prime is 90951433. The reversal of 90951431 is 13415909.

It is a de Polignac number, because none of the positive numbers 2^k-90951431 is a prime.

It is a super-2 number, since 2×90951431² = 16544325601895522, 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 (90951433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13310 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (15281580).

Almost surely, 2^90951431 is an apocalyptic number.

90951431 is a deficient number, since it is larger than the sum of its proper divisors (738049).

90951431 is an equidigital number, since it uses as much as digits as its factorization.

90951431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893 (or 5766 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 90951431 is about 9536.8459670900. The cubic root of 90951431 is about 449.7141081189.

The spelling of 90951431 in words is "ninety million, nine hundred fifty-one thousand, four hundred thirty-one".