91180967 has 2 divisors, whose sum is σ = 91180968. Its totient is φ = 91180966.

The previous prime is 91180961. The next prime is 91181009. The reversal of 91180967 is 76908119.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91180967 - 2⁸ = 91180711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91180961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45590483 + 45590484.

It is an arithmetic number, because the mean of its divisors is an integer number (45590484).

Almost surely, 2^91180967 is an apocalyptic number.

91180967 is a deficient number, since it is larger than the sum of its proper divisors (1).

91180967 is an equidigital number, since it uses as much as digits as its factorization.

91180967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 91180967 is about 9548.8725512492. The cubic root of 91180967 is about 450.0921078947.

The spelling of 91180967 in words is "ninety-one million, one hundred eighty thousand, nine hundred sixty-seven".