79690031 has 2 divisors, whose sum is σ = 79690032. Its totient is φ = 79690030.

The previous prime is 79690021. The next prime is 79690049. The reversal of 79690031 is 13009697.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79690031 - 2¹⁰ = 79689007 is a prime.

It is a super-2 number, since 2×79690031² = 12701002081561922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79689973 and 79690000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79690021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39845015 + 39845016.

It is an arithmetic number, because the mean of its divisors is an integer number (39845016).

Almost surely, 2^79690031 is an apocalyptic number.

79690031 is a deficient number, since it is larger than the sum of its proper divisors (1).

79690031 is an equidigital number, since it uses as much as digits as its factorization.

79690031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 79690031 is about 8926.9272989086. The cubic root of 79690031 is about 430.3297110673.

The spelling of 79690031 in words is "seventy-nine million, six hundred ninety thousand, thirty-one".