91257368 has 16 divisors (see below), whose sum is σ = 171407880. Its totient is φ = 45548608.

The previous prime is 91257367. The next prime is 91257391. The reversal of 91257368 is 86375219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91257367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5021 + ... + 14412.

Almost surely, 2^91257368 is an apocalyptic number.

It is an amenable number.

91257368 is a deficient number, since it is larger than the sum of its proper divisors (80150512).

91257368 is a wasteful number, since it uses less digits than its factorization.

91257368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20026 (or 20022 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 91257368 is about 9552.8722382329. The cubic root of 91257368 is about 450.2177842949.

The spelling of 91257368 in words is "ninety-one million, two hundred fifty-seven thousand, three hundred sixty-eight".