79791031 has 2 divisors, whose sum is σ = 79791032. Its totient is φ = 79791030.

The previous prime is 79790999. The next prime is 79791067. The reversal of 79791031 is 13019797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79791031 - 2⁵ = 79790999 is a prime.

It is a super-2 number, since 2×79791031² = 12733217256085922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79791091) 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 as a sum of consecutive naturals, namely, 39895515 + 39895516.

It is an arithmetic number, because the mean of its divisors is an integer number (39895516).

Almost surely, 2^79791031 is an apocalyptic number.

79791031 is a deficient number, since it is larger than the sum of its proper divisors (1).

79791031 is an equidigital number, since it uses as much as digits as its factorization.

79791031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 79791031 is about 8932.5825492967. The cubic root of 79791031 is about 430.5114358127.

The spelling of 79791031 in words is "seventy-nine million, seven hundred ninety-one thousand, thirty-one".