317257189 has 2 divisors, whose sum is σ = 317257190. Its totient is φ = 317257188.

The previous prime is 317257183. The next prime is 317257217. The reversal of 317257189 is 981752713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311804964 + 5452225 = 17658^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 317257189 - 2⁹ = 317256677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317257183) 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, 158628594 + 158628595.

It is an arithmetic number, because the mean of its divisors is an integer number (158628595).

Almost surely, 2^317257189 is an apocalyptic number.

It is an amenable number.

317257189 is a deficient number, since it is larger than the sum of its proper divisors (1).

317257189 is an equidigital number, since it uses as much as digits as its factorization.

317257189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The square root of 317257189 is about 17811.7149370856. The cubic root of 317257189 is about 682.0305431751.

The spelling of 317257189 in words is "three hundred seventeen million, two hundred fifty-seven thousand, one hundred eighty-nine".