79039896209 has 2 divisors, whose sum is σ = 79039896210. Its totient is φ = 79039896208.

The previous prime is 79039896167. The next prime is 79039896239. The reversal of 79039896209 is 90269893097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78011283025 + 1028613184 = 279305^2 + 32072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79039896209 is a prime.

It is not a weakly prime, because it can be changed into another prime (79039896239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39519948104 + 39519948105.

It is an arithmetic number, because the mean of its divisors is an integer number (39519948105).

Almost surely, 2^79039896209 is an apocalyptic number.

It is an amenable number.

79039896209 is a deficient number, since it is larger than the sum of its proper divisors (1).

79039896209 is an equidigital number, since it uses as much as digits as its factorization.

79039896209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 79039896209 in words is "seventy-nine billion, thirty-nine million, eight hundred ninety-six thousand, two hundred nine".