136436999917 has 2 divisors, whose sum is σ = 136436999918. Its totient is φ = 136436999916.

The previous prime is 136436999903. The next prime is 136436999939. The reversal of 136436999917 is 719999634631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87084600201 + 49352399716 = 295101^2 + 222154^2 .

It is an emirp because it is prime and its reverse (719999634631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136436999917 - 2²³ = 136428611309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136436999947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68218499958 + 68218499959.

It is an arithmetic number, because the mean of its divisors is an integer number (68218499959).

Almost surely, 2^136436999917 is an apocalyptic number.

It is an amenable number.

136436999917 is a deficient number, since it is larger than the sum of its proper divisors (1).

136436999917 is an equidigital number, since it uses as much as digits as its factorization.

136436999917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 67.

The spelling of 136436999917 in words is "one hundred thirty-six billion, four hundred thirty-six million, nine hundred ninety-nine thousand, nine hundred seventeen".