136397243513 has 2 divisors, whose sum is σ = 136397243514. Its totient is φ = 136397243512.

The previous prime is 136397243509. The next prime is 136397243557. The reversal of 136397243513 is 315342793631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77210625424 + 59186618089 = 277868^2 + 243283^2 .

It is an emirp because it is prime and its reverse (315342793631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136397243513 - 2² = 136397243509 is a prime.

It is not a weakly prime, because it can be changed into another prime (136397243503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68198621756 + 68198621757.

It is an arithmetic number, because the mean of its divisors is an integer number (68198621757).

Almost surely, 2^136397243513 is an apocalyptic number.

It is an amenable number.

136397243513 is a deficient number, since it is larger than the sum of its proper divisors (1).

136397243513 is an equidigital number, since it uses as much as digits as its factorization.

136397243513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 47.

The spelling of 136397243513 in words is "one hundred thirty-six billion, three hundred ninety-seven million, two hundred forty-three thousand, five hundred thirteen".