136393217 has 2 divisors, whose sum is σ = 136393218. Its totient is φ = 136393216.

The previous prime is 136393181. The next prime is 136393219. The reversal of 136393217 is 712393631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 66520336 = 8359^2 + 8156^2 .

It is an emirp because it is prime and its reverse (712393631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136393217 - 2²⁶ = 69284353 is a prime.

Together with 136393219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136393219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68196608 + 68196609.

It is an arithmetic number, because the mean of its divisors is an integer number (68196609).

Almost surely, 2^136393217 is an apocalyptic number.

It is an amenable number.

136393217 is a deficient number, since it is larger than the sum of its proper divisors (1).

136393217 is an equidigital number, since it uses as much as digits as its factorization.

136393217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 35.

The square root of 136393217 is about 11678.7506609226. The cubic root of 136393217 is about 514.7514645816.

The spelling of 136393217 in words is "one hundred thirty-six million, three hundred ninety-three thousand, two hundred seventeen".