91479 has 4 divisors (see below), whose sum is σ = 121976. Its totient is φ = 60984.

The previous prime is 91463. The next prime is 91493. The reversal of 91479 is 97419.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 91479 - 2⁴ = 91463 is a prime.

It is a D-number.

It is a Duffinian number.

91479 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91479.

It is not an unprimeable number, because it can be changed into a prime (91459) 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, 15244 + ... + 15249.

It is an arithmetic number, because the mean of its divisors is an integer number (30494).

2⁹¹⁴⁷⁹ is an apocalyptic number.

91479 is a deficient number, since it is larger than the sum of its proper divisors (30497).

91479 is a wasteful number, since it uses less digits than its factorization.

91479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30496.

The product of its digits is 2268, while the sum is 30.

The square root of 91479 is about 302.4549553239. The cubic root of 91479 is about 45.0581963100.

The spelling of 91479 in words is "ninety-one thousand, four hundred seventy-nine".