13136318729 has 2 divisors, whose sum is σ = 13136318730. Its totient is φ = 13136318728.

The previous prime is 13136318719. The next prime is 13136318747. The reversal of 13136318729 is 92781363131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11124975625 + 2011343104 = 105475^2 + 44848^2 .

It is a cyclic number.

It is not a de Polignac number, because 13136318729 - 2⁸ = 13136318473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13136318729.

It is not a weakly prime, because it can be changed into another prime (13136318719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568159364 + 6568159365.

It is an arithmetic number, because the mean of its divisors is an integer number (6568159365).

Almost surely, 2^13136318729 is an apocalyptic number.

It is an amenable number.

13136318729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136318729 is an equidigital number, since it uses as much as digits as its factorization.

13136318729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The spelling of 13136318729 in words is "thirteen billion, one hundred thirty-six million, three hundred eighteen thousand, seven hundred twenty-nine".