79776679 has 2 divisors, whose sum is σ = 79776680. Its totient is φ = 79776678.

The previous prime is 79776667. The next prime is 79776707. The reversal of 79776679 is 97667797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79776679 - 2⁵ = 79776647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79776629) 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, 39888339 + 39888340.

It is an arithmetic number, because the mean of its divisors is an integer number (39888340).

Almost surely, 2^79776679 is an apocalyptic number.

79776679 is a deficient number, since it is larger than the sum of its proper divisors (1).

79776679 is an equidigital number, since it uses as much as digits as its factorization.

79776679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7001316, while the sum is 58.

The square root of 79776679 is about 8931.7791620707. The cubic root of 79776679 is about 430.4856222572.

The spelling of 79776679 in words is "seventy-nine million, seven hundred seventy-six thousand, six hundred seventy-nine".