79879831 has 2 divisors, whose sum is σ = 79879832. Its totient is φ = 79879830.

The previous prime is 79879801. The next prime is 79879843. The reversal of 79879831 is 13897897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79879831 - 2⁵ = 79879799 is a prime.

It is a super-2 number, since 2×79879831² = 12761574801177122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79879801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39939915 + 39939916.

It is an arithmetic number, because the mean of its divisors is an integer number (39939916).

Almost surely, 2^79879831 is an apocalyptic number.

79879831 is a deficient number, since it is larger than the sum of its proper divisors (1).

79879831 is an equidigital number, since it uses as much as digits as its factorization.

79879831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 79879831 is about 8937.5517341160. The cubic root of 79879831 is about 430.6710830056.

The spelling of 79879831 in words is "seventy-nine million, eight hundred seventy-nine thousand, eight hundred thirty-one".