13408068689 has 2 divisors, whose sum is σ = 13408068690. Its totient is φ = 13408068688.

The previous prime is 13408068683. The next prime is 13408068701. The reversal of 13408068689 is 98686080431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12789800464 + 618268225 = 113092^2 + 24865^2 .

It is a cyclic number.

It is not a de Polignac number, because 13408068689 - 2⁸ = 13408068433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13408068689.

It is not a weakly prime, because it can be changed into another prime (13408068683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704034344 + 6704034345.

It is an arithmetic number, because the mean of its divisors is an integer number (6704034345).

Almost surely, 2^13408068689 is an apocalyptic number.

It is an amenable number.

13408068689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13408068689 is an equidigital number, since it uses as much as digits as its factorization.

13408068689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 13408068689 in words is "thirteen billion, four hundred eight million, sixty-eight thousand, six hundred eighty-nine".