79311947 has 16 divisors (see below), whose sum is σ = 98085120. Its totient is φ = 63050400.

The previous prime is 79311929. The next prime is 79311949. The reversal of 79311947 is 74911397.

It is a cyclic number.

It is not a de Polignac number, because 79311947 - 2¹⁶ = 79246411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79311949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11879 + ... + 17312.

It is an arithmetic number, because the mean of its divisors is an integer number (6130320).

Almost surely, 2^79311947 is an apocalyptic number.

79311947 is a deficient number, since it is larger than the sum of its proper divisors (18773173).

79311947 is a wasteful number, since it uses less digits than its factorization.

79311947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29234.

The product of its digits is 47628, while the sum is 41.

The square root of 79311947 is about 8905.7255178902. The cubic root of 79311947 is about 429.6480751319.

The spelling of 79311947 in words is "seventy-nine million, three hundred eleven thousand, nine hundred forty-seven".