91079879 has 8 divisors (see below), whose sum is σ = 99439488. Its totient is φ = 82733560.

The previous prime is 91079873. The next prime is 91079887. The reversal of 91079879 is 97897019.

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

It is a cyclic number.

It is not a de Polignac number, because 91079879 - 2²⁴ = 74302663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91079873) 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, 15854 + ... + 20820.

It is an arithmetic number, because the mean of its divisors is an integer number (12429936).

Almost surely, 2^91079879 is an apocalyptic number.

91079879 is a deficient number, since it is larger than the sum of its proper divisors (8359609).

91079879 is a wasteful number, since it uses less digits than its factorization.

91079879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6645.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 91079879 is about 9543.5778930127. The cubic root of 91079879 is about 449.9257144867.

The spelling of 91079879 in words is "ninety-one million, seventy-nine thousand, eight hundred seventy-nine".