613656317 has 2 divisors, whose sum is σ = 613656318. Its totient is φ = 613656316.

The previous prime is 613656289. The next prime is 613656341. The reversal of 613656317 is 713656316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490135321 + 123520996 = 22139^2 + 11114^2 .

It is a cyclic number.

It is not a de Polignac number, because 613656317 - 2²² = 609462013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613656347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306828158 + 306828159.

It is an arithmetic number, because the mean of its divisors is an integer number (306828159).

Almost surely, 2^613656317 is an apocalyptic number.

It is an amenable number.

613656317 is a deficient number, since it is larger than the sum of its proper divisors (1).

613656317 is an equidigital number, since it uses as much as digits as its factorization.

613656317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 613656317 is about 24772.0874574591. The cubic root of 613656317 is about 849.7837129047.

Subtracting 613656317 from its reverse (713656316), we obtain a palindrome (99999999).

The spelling of 613656317 in words is "six hundred thirteen million, six hundred fifty-six thousand, three hundred seventeen".