79369137613 has 2 divisors, whose sum is σ = 79369137614. Its totient is φ = 79369137612.

The previous prime is 79369137517. The next prime is 79369137619. The reversal of 79369137613 is 31673196397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79331228964 + 37908649 = 281658^2 + 6157^2 .

It is an emirp because it is prime and its reverse (31673196397) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79369137613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79369137619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39684568806 + 39684568807.

It is an arithmetic number, because the mean of its divisors is an integer number (39684568807).

Almost surely, 2^79369137613 is an apocalyptic number.

It is an amenable number.

79369137613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79369137613 is an equidigital number, since it uses as much as digits as its factorization.

79369137613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3857868, while the sum is 55.

The spelling of 79369137613 in words is "seventy-nine billion, three hundred sixty-nine million, one hundred thirty-seven thousand, six hundred thirteen".