91245907 has 2 divisors, whose sum is σ = 91245908. Its totient is φ = 91245906.

The previous prime is 91245887. The next prime is 91245929. The reversal of 91245907 is 70954219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91245907 - 2¹⁵ = 91213139 is a prime.

It is not a weakly prime, because it can be changed into another prime (91246907) 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, 45622953 + 45622954.

It is an arithmetic number, because the mean of its divisors is an integer number (45622954).

Almost surely, 2^91245907 is an apocalyptic number.

91245907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91245907 is an equidigital number, since it uses as much as digits as its factorization.

91245907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 91245907 is about 9552.2723474574. The cubic root of 91245907 is about 450.1989359098.

The spelling of 91245907 in words is "ninety-one million, two hundred forty-five thousand, nine hundred seven".