91514977 has 4 divisors (see below), whose sum is σ = 91739140. Its totient is φ = 91290816.

The previous prime is 91514957. The next prime is 91514987. The reversal of 91514977 is 77941519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77941519 = 151 ⋅516169.

It can be written as a sum of positive squares in 2 ways, for example, as 47941776 + 43573201 = 6924^2 + 6601^2 .

It is a cyclic number.

It is not a de Polignac number, because 91514977 - 2²³ = 83126369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91514957) 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, 111468 + ... + 112285.

It is an arithmetic number, because the mean of its divisors is an integer number (22934785).

Almost surely, 2^91514977 is an apocalyptic number.

It is an amenable number.

91514977 is a deficient number, since it is larger than the sum of its proper divisors (224163).

91514977 is a wasteful number, since it uses less digits than its factorization.

91514977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224162.

The product of its digits is 79380, while the sum is 43.

The square root of 91514977 is about 9566.3460631528. The cubic root of 91514977 is about 450.6410238781.

The spelling of 91514977 in words is "ninety-one million, five hundred fourteen thousand, nine hundred seventy-seven".