91408079179 has 4 divisors (see below), whose sum is σ = 92246685520. Its totient is φ = 90569472840.

The previous prime is 91408079173. The next prime is 91408079219. The reversal of 91408079179 is 97197080419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97197080419 = 1033 ⋅94092043.

It is a cyclic number.

It is not a de Polignac number, because 91408079179 - 2²⁷ = 91273861451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91408079173) 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, 419303007 + ... + 419303224.

It is an arithmetic number, because the mean of its divisors is an integer number (23061671380).

Almost surely, 2^91408079179 is an apocalyptic number.

91408079179 is a deficient number, since it is larger than the sum of its proper divisors (838606341).

91408079179 is a wasteful number, since it uses less digits than its factorization.

91408079179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838606340.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 91408079179 in words is "ninety-one billion, four hundred eight million, seventy-nine thousand, one hundred seventy-nine".