90712331 has 2 divisors, whose sum is σ = 90712332. Its totient is φ = 90712330.

The previous prime is 90712301. The next prime is 90712339. The reversal of 90712331 is 13321709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90712331 - 2⁶ = 90712267 is a prime.

It is a super-2 number, since 2×90712331² = 16457453990907122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90712331.

It is not a weakly prime, because it can be changed into another prime (90712339) 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, 45356165 + 45356166.

It is an arithmetic number, because the mean of its divisors is an integer number (45356166).

Almost surely, 2^90712331 is an apocalyptic number.

90712331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90712331 is an equidigital number, since it uses as much as digits as its factorization.

90712331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 90712331 is about 9524.3021266652. The cubic root of 90712331 is about 449.3196814649.

The spelling of 90712331 in words is "ninety million, seven hundred twelve thousand, three hundred thirty-one".