90745331 has 2 divisors, whose sum is σ = 90745332. Its totient is φ = 90745330.

The previous prime is 90745279. The next prime is 90745397. The reversal of 90745331 is 13354709.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90745331 - 2¹⁴ = 90728947 is a prime.

It is a super-2 number, since 2×90745331² = 16469430196599122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90745231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45372665 + 45372666.

It is an arithmetic number, because the mean of its divisors is an integer number (45372666).

Almost surely, 2^90745331 is an apocalyptic number.

90745331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90745331 is an equidigital number, since it uses as much as digits as its factorization.

90745331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 90745331 is about 9526.0343795307. The cubic root of 90745331 is about 449.3741604670.

The spelling of 90745331 in words is "ninety million, seven hundred forty-five thousand, three hundred thirty-one".