79491 has 4 divisors (see below), whose sum is σ = 105992. Its totient is φ = 52992.

The previous prime is 79481. The next prime is 79493. The reversal of 79491 is 19497.

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

It is not a de Polignac number, because 79491 - 2⁶ = 79427 is a prime.

It is a D-number.

It is a Duffinian number.

79491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (79493) 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, 13246 + ... + 13251.

It is an arithmetic number, because the mean of its divisors is an integer number (26498).

2⁷⁹⁴⁹¹ is an apocalyptic number.

79491 is a deficient number, since it is larger than the sum of its proper divisors (26501).

79491 is a wasteful number, since it uses less digits than its factorization.

79491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26500.

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

The square root of 79491 is about 281.9414832904. The cubic root of 79491 is about 42.9971153644.

The spelling of 79491 in words is "seventy-nine thousand, four hundred ninety-one".