91912967 has 2 divisors, whose sum is σ = 91912968. Its totient is φ = 91912966.

The previous prime is 91912963. The next prime is 91912987. The reversal of 91912967 is 76921919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91912967 - 2² = 91912963 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91912963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45956483 + 45956484.

It is an arithmetic number, because the mean of its divisors is an integer number (45956484).

Almost surely, 2^91912967 is an apocalyptic number.

91912967 is a deficient number, since it is larger than the sum of its proper divisors (1).

91912967 is an equidigital number, since it uses as much as digits as its factorization.

91912967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 44.

The square root of 91912967 is about 9587.1250643767. The cubic root of 91912967 is about 451.2933442608.

The spelling of 91912967 in words is "ninety-one million, nine hundred twelve thousand, nine hundred sixty-seven".