13399197817 has 2 divisors, whose sum is σ = 13399197818. Its totient is φ = 13399197816.

The previous prime is 13399197811. The next prime is 13399197829. The reversal of 13399197817 is 71879199331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11046850816 + 2352347001 = 105104^2 + 48501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13399197817 is a prime.

It is not a weakly prime, because it can be changed into another prime (13399197811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6699598908 + 6699598909.

It is an arithmetic number, because the mean of its divisors is an integer number (6699598909).

Almost surely, 2^13399197817 is an apocalyptic number.

It is an amenable number.

13399197817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13399197817 is an equidigital number, since it uses as much as digits as its factorization.

13399197817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 58.

The spelling of 13399197817 in words is "thirteen billion, three hundred ninety-nine million, one hundred ninety-seven thousand, eight hundred seventeen".