136645217 has 2 divisors, whose sum is σ = 136645218. Its totient is φ = 136645216.

The previous prime is 136645213. The next prime is 136645253. The reversal of 136645217 is 712546631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102900736 + 33744481 = 10144^2 + 5809^2 .

It is a cyclic number.

It is not a de Polignac number, because 136645217 - 2² = 136645213 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136645211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68322608 + 68322609.

It is an arithmetic number, because the mean of its divisors is an integer number (68322609).

Almost surely, 2^136645217 is an apocalyptic number.

It is an amenable number.

136645217 is a deficient number, since it is larger than the sum of its proper divisors (1).

136645217 is an equidigital number, since it uses as much as digits as its factorization.

136645217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 136645217 is about 11689.5345074130. The cubic root of 136645217 is about 515.0682876740.

It can be divided in two parts, 13664 and 5217, that added together give a palindrome (18881).

The spelling of 136645217 in words is "one hundred thirty-six million, six hundred forty-five thousand, two hundred seventeen".