79797479779 has 2 divisors, whose sum is σ = 79797479780. Its totient is φ = 79797479778.

The previous prime is 79797479767. The next prime is 79797479813. The reversal of 79797479779 is 97797479797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79797479779 - 2¹⁷ = 79797348707 is a prime.

It is not a weakly prime, because it can be changed into another prime (79797429779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39898739889 + 39898739890.

It is an arithmetic number, because the mean of its divisors is an integer number (39898739890).

Almost surely, 2^79797479779 is an apocalyptic number.

79797479779 is a deficient number, since it is larger than the sum of its proper divisors (1).

79797479779 is an equidigital number, since it uses as much as digits as its factorization.

79797479779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3087580356, while the sum is 82.

The spelling of 79797479779 in words is "seventy-nine billion, seven hundred ninety-seven million, four hundred seventy-nine thousand, seven hundred seventy-nine".