317256209 has 2 divisors, whose sum is σ = 317256210. Its totient is φ = 317256208.

The previous prime is 317256113. The next prime is 317256217. The reversal of 317256209 is 902652713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163123984 + 154132225 = 12772^2 + 12415^2 .

It is an emirp because it is prime and its reverse (902652713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317256209 - 2¹⁶ = 317190673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (317256229) 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, 158628104 + 158628105.

It is an arithmetic number, because the mean of its divisors is an integer number (158628105).

Almost surely, 2^317256209 is an apocalyptic number.

It is an amenable number.

317256209 is a deficient number, since it is larger than the sum of its proper divisors (1).

317256209 is an equidigital number, since it uses as much as digits as its factorization.

317256209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 317256209 is about 17811.6874270800. The cubic root of 317256209 is about 682.0298409156.

The spelling of 317256209 in words is "three hundred seventeen million, two hundred fifty-six thousand, two hundred nine".