79313791 has 2 divisors, whose sum is σ = 79313792. Its totient is φ = 79313790.

The previous prime is 79313783. The next prime is 79313797. The reversal of 79313791 is 19731397.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79313791 - 2³ = 79313783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79313797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39656895 + 39656896.

It is an arithmetic number, because the mean of its divisors is an integer number (39656896).

Almost surely, 2^79313791 is an apocalyptic number.

79313791 is a deficient number, since it is larger than the sum of its proper divisors (1).

79313791 is an equidigital number, since it uses as much as digits as its factorization.

79313791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 40.

The square root of 79313791 is about 8905.8290461922. The cubic root of 79313791 is about 429.6514048737.

The spelling of 79313791 in words is "seventy-nine million, three hundred thirteen thousand, seven hundred ninety-one".