13136308981 has 2 divisors, whose sum is σ = 13136308982. Its totient is φ = 13136308980.

The previous prime is 13136308973. The next prime is 13136309041. The reversal of 13136308981 is 18980363131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8008460100 + 5127848881 = 89490^2 + 71609^2 .

It is an emirp because it is prime and its reverse (18980363131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13136308981 - 2³ = 13136308973 is a prime.

It is a super-2 number, since 2×13136308981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13136308921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568154490 + 6568154491.

It is an arithmetic number, because the mean of its divisors is an integer number (6568154491).

Almost surely, 2^13136308981 is an apocalyptic number.

It is an amenable number.

13136308981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136308981 is an equidigital number, since it uses as much as digits as its factorization.

13136308981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 13136308981 in words is "thirteen billion, one hundred thirty-six million, three hundred eight thousand, nine hundred eighty-one".