91913167 has 2 divisors, whose sum is σ = 91913168. Its totient is φ = 91913166.

The previous prime is 91913161. The next prime is 91913179. The reversal of 91913167 is 76131919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91913167 - 2⁷ = 91913039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91913161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45956583 + 45956584.

It is an arithmetic number, because the mean of its divisors is an integer number (45956584).

Almost surely, 2^91913167 is an apocalyptic number.

91913167 is a deficient number, since it is larger than the sum of its proper divisors (1).

91913167 is an equidigital number, since it uses as much as digits as its factorization.

91913167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 91913167 is about 9587.1354950267. The cubic root of 91913167 is about 451.2936715943.

The spelling of 91913167 in words is "ninety-one million, nine hundred thirteen thousand, one hundred sixty-seven".