79902312439 has 2 divisors, whose sum is σ = 79902312440. Its totient is φ = 79902312438.

The previous prime is 79902312431. The next prime is 79902312463. The reversal of 79902312439 is 93421320997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79902312439 - 2³ = 79902312431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79902312392 and 79902312401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79902312431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39951156219 + 39951156220.

It is an arithmetic number, because the mean of its divisors is an integer number (39951156220).

Almost surely, 2^79902312439 is an apocalyptic number.

79902312439 is a deficient number, since it is larger than the sum of its proper divisors (1).

79902312439 is an equidigital number, since it uses as much as digits as its factorization.

79902312439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 79902312439 in words is "seventy-nine billion, nine hundred two million, three hundred twelve thousand, four hundred thirty-nine".