79206871613 has 2 divisors, whose sum is σ = 79206871614. Its totient is φ = 79206871612.

The previous prime is 79206871607. The next prime is 79206871637. The reversal of 79206871613 is 31617860297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58758729604 + 20448142009 = 242402^2 + 142997^2 .

It is a cyclic number.

It is not a de Polignac number, because 79206871613 - 2³² = 74911904317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79206871693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39603435806 + 39603435807.

It is an arithmetic number, because the mean of its divisors is an integer number (39603435807).

Almost surely, 2^79206871613 is an apocalyptic number.

It is an amenable number.

79206871613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79206871613 is an equidigital number, since it uses as much as digits as its factorization.

79206871613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 79206871613 in words is "seventy-nine billion, two hundred six million, eight hundred seventy-one thousand, six hundred thirteen".