91507375867 has 2 divisors, whose sum is σ = 91507375868. Its totient is φ = 91507375866.

The previous prime is 91507375849. The next prime is 91507375879. The reversal of 91507375867 is 76857370519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91507375867 - 2²⁷ = 91373158139 is a prime.

It is not a weakly prime, because it can be changed into another prime (91507375847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45753687933 + 45753687934.

It is an arithmetic number, because the mean of its divisors is an integer number (45753687934).

Almost surely, 2^91507375867 is an apocalyptic number.

91507375867 is a deficient number, since it is larger than the sum of its proper divisors (1).

91507375867 is an equidigital number, since it uses as much as digits as its factorization.

91507375867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11113200, while the sum is 58.

The spelling of 91507375867 in words is "ninety-one billion, five hundred seven million, three hundred seventy-five thousand, eight hundred sixty-seven".