136660717 has 2 divisors, whose sum is σ = 136660718. Its totient is φ = 136660716.

The previous prime is 136660703. The next prime is 136660723. The reversal of 136660717 is 717066631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86378436 + 50282281 = 9294^2 + 7091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136660717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136660747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68330358 + 68330359.

It is an arithmetic number, because the mean of its divisors is an integer number (68330359).

Almost surely, 2^136660717 is an apocalyptic number.

It is an amenable number.

136660717 is a deficient number, since it is larger than the sum of its proper divisors (1).

136660717 is an equidigital number, since it uses as much as digits as its factorization.

136660717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 136660717 is about 11690.1974748077. The cubic root of 136660717 is about 515.0877620881.

The spelling of 136660717 in words is "one hundred thirty-six million, six hundred sixty thousand, seven hundred seventeen".