91313577 has 12 divisors (see below), whose sum is σ = 132097264. Its totient is φ = 60783480.

The previous prime is 91313567. The next prime is 91313581. The reversal of 91313577 is 77531319.

It is not a de Polignac number, because 91313577 - 2⁶ = 91313513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91313557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123 + ... + 13560.

Almost surely, 2^91313577 is an apocalyptic number.

It is an amenable number.

91313577 is a deficient number, since it is larger than the sum of its proper divisors (40783687).

91313577 is a wasteful number, since it uses less digits than its factorization.

91313577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380 (or 15377 counting only the distinct ones).

The product of its digits is 19845, while the sum is 36.

The square root of 91313577 is about 9555.8137801027. The cubic root of 91313577 is about 450.3102009332.

The spelling of 91313577 in words is "ninety-one million, three hundred thirteen thousand, five hundred seventy-seven".