91516911 has 4 divisors (see below), whose sum is σ = 122022552. Its totient is φ = 61011272.

The previous prime is 91516907. The next prime is 91516937. The reversal of 91516911 is 11961519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11961519 = 3 ⋅3987173.

It is a cyclic number.

It is not a de Polignac number, because 91516911 - 2² = 91516907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91516951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15252816 + ... + 15252821.

It is an arithmetic number, because the mean of its divisors is an integer number (30505638).

Almost surely, 2^91516911 is an apocalyptic number.

91516911 is a deficient number, since it is larger than the sum of its proper divisors (30505641).

91516911 is a wasteful number, since it uses less digits than its factorization.

91516911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30505640.

The product of its digits is 2430, while the sum is 33.

The square root of 91516911 is about 9566.4471461457. The cubic root of 91516911 is about 450.6441983442.

The spelling of 91516911 in words is "ninety-one million, five hundred sixteen thousand, nine hundred eleven".