91057312 has 24 divisors (see below), whose sum is σ = 179667936. Its totient is φ = 45427392.

The previous prime is 91057301. The next prime is 91057313. The reversal of 91057312 is 21375019.

It is not an unprimeable number, because it can be changed into a prime (91057313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12663 + ... + 18505.

It is an arithmetic number, because the mean of its divisors is an integer number (7486164).

Almost surely, 2^91057312 is an apocalyptic number.

It is an amenable number.

91057312 is a deficient number, since it is larger than the sum of its proper divisors (88610624).

91057312 is a wasteful number, since it uses less digits than its factorization.

91057312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340 (or 6332 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91057312 is about 9542.3955063705. The cubic root of 91057312 is about 449.8885518246. Note that the first 3 decimals are identical.

The spelling of 91057312 in words is "ninety-one million, fifty-seven thousand, three hundred twelve".