317839 has 2 divisors, whose sum is σ = 317840. Its totient is φ = 317838.

The previous prime is 317831. The next prime is 317857. The reversal of 317839 is 938713.

It is a weak prime.

It is an emirp because it is prime and its reverse (938713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317839 - 2³ = 317831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158919 + 158920.

It is an arithmetic number, because the mean of its divisors is an integer number (158920).

2³¹⁷⁸³⁹ is an apocalyptic number.

317839 is a deficient number, since it is larger than the sum of its proper divisors (1).

317839 is an equidigital number, since it uses as much as digits as its factorization.

317839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 317839 is about 563.7721170828. The cubic root of 317839 is about 68.2447208858.

It can be divided in two parts, 317 and 839, that added together give a square (1156 = 34²).

The spelling of 317839 in words is "three hundred seventeen thousand, eight hundred thirty-nine".