91912977 has 48 divisors (see below), whose sum is σ = 149909760. Its totient is φ = 53875584.

The previous prime is 91912967. The next prime is 91912987. The reversal of 91912977 is 77921919.

It is an interprime number because it is at equal distance from previous prime (91912967) and next prime (91912987).

It is not a de Polignac number, because 91912977 - 2⁸ = 91912721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91912927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 349348 + ... + 349610.

It is an arithmetic number, because the mean of its divisors is an integer number (3123120).

Almost surely, 2^91912977 is an apocalyptic number.

It is an amenable number.

91912977 is a deficient number, since it is larger than the sum of its proper divisors (57996783).

91912977 is a wasteful number, since it uses less digits than its factorization.

91912977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 411 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 91912977 is about 9587.1255859095. The cubic root of 91912977 is about 451.2933606275.

The spelling of 91912977 in words is "ninety-one million, nine hundred twelve thousand, nine hundred seventy-seven".