317890439 has 2 divisors, whose sum is σ = 317890440. Its totient is φ = 317890438.

The previous prime is 317890423. The next prime is 317890471. The reversal of 317890439 is 934098713.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 317890439 - 2⁴ = 317890423 is a prime.

It is a super-2 number, since 2×317890439² = 202108662415225442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 317890439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317890409) 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, 158945219 + 158945220.

It is an arithmetic number, because the mean of its divisors is an integer number (158945220).

Almost surely, 2^317890439 is an apocalyptic number.

317890439 is a deficient number, since it is larger than the sum of its proper divisors (1).

317890439 is an equidigital number, since it uses as much as digits as its factorization.

317890439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 317890439 is about 17829.4822975879. The cubic root of 317890439 is about 682.4840225790.

The spelling of 317890439 in words is "three hundred seventeen million, eight hundred ninety thousand, four hundred thirty-nine".