317320517 has 2 divisors, whose sum is σ = 317320518. Its totient is φ = 317320516.

The previous prime is 317320499. The next prime is 317320543. The reversal of 317320517 is 715023713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314494756 + 2825761 = 17734^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 317320517 - 2⁸ = 317320261 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317320517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317320567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158660258 + 158660259.

It is an arithmetic number, because the mean of its divisors is an integer number (158660259).

Almost surely, 2^317320517 is an apocalyptic number.

It is an amenable number.

317320517 is a deficient number, since it is larger than the sum of its proper divisors (1).

317320517 is an equidigital number, since it uses as much as digits as its factorization.

317320517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 317320517 is about 17813.4925548024. The cubic root of 317320517 is about 682.0759204045.

The spelling of 317320517 in words is "three hundred seventeen million, three hundred twenty thousand, five hundred seventeen".