79923491 has 4 divisors (see below), whose sum is σ = 80329392. Its totient is φ = 79517592.

The previous prime is 79923463. The next prime is 79923497. The reversal of 79923491 is 19432997.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79923491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79923497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202655 + ... + 203048.

It is an arithmetic number, because the mean of its divisors is an integer number (20082348).

Almost surely, 2^79923491 is an apocalyptic number.

79923491 is a deficient number, since it is larger than the sum of its proper divisors (405901).

79923491 is a wasteful number, since it uses less digits than its factorization.

79923491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405900.

The product of its digits is 122472, while the sum is 44.

The square root of 79923491 is about 8939.9939038011. The cubic root of 79923491 is about 430.7495328243.

The spelling of 79923491 in words is "seventy-nine million, nine hundred twenty-three thousand, four hundred ninety-one".