91612491 has 8 divisors (see below), whose sum is σ = 125129424. Its totient is φ = 59585280.

The previous prime is 91612459. The next prime is 91612513. The reversal of 91612491 is 19421619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91612491 - 2⁵ = 91612459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91612291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372286 + ... + 372531.

It is an arithmetic number, because the mean of its divisors is an integer number (15641178).

Almost surely, 2^91612491 is an apocalyptic number.

91612491 is a deficient number, since it is larger than the sum of its proper divisors (33516933).

91612491 is a wasteful number, since it uses less digits than its factorization.

91612491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744861.

The product of its digits is 3888, while the sum is 33.

The square root of 91612491 is about 9571.4414274967. The cubic root of 91612491 is about 450.8010275967.

The spelling of 91612491 in words is "ninety-one million, six hundred twelve thousand, four hundred ninety-one".