90931307 has 2 divisors, whose sum is σ = 90931308. Its totient is φ = 90931306.

The previous prime is 90931301. The next prime is 90931349. The reversal of 90931307 is 70313909.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70313909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90931307 - 2²² = 86737003 is a prime.

It is not a weakly prime, because it can be changed into another prime (90931301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45465653 + 45465654.

It is an arithmetic number, because the mean of its divisors is an integer number (45465654).

Almost surely, 2^90931307 is an apocalyptic number.

90931307 is a deficient number, since it is larger than the sum of its proper divisors (1).

90931307 is an equidigital number, since it uses as much as digits as its factorization.

90931307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 90931307 is about 9535.7908429244. The cubic root of 90931307 is about 449.6809376155.

The spelling of 90931307 in words is "ninety million, nine hundred thirty-one thousand, three hundred seven".