317491 has 2 divisors, whose sum is σ = 317492. Its totient is φ = 317490.

The previous prime is 317489. The next prime is 317503. The reversal of 317491 is 194713.

It is a weak prime.

It is an emirp because it is prime and its reverse (194713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317491 - 2¹ = 317489 is a prime.

Together with 317489, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (317411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158745 + 158746.

It is an arithmetic number, because the mean of its divisors is an integer number (158746).

2³¹⁷⁴⁹¹ is an apocalyptic number.

317491 is a deficient number, since it is larger than the sum of its proper divisors (1).

317491 is an equidigital number, since it uses as much as digits as its factorization.

317491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 317491 is about 563.4633972141. The cubic root of 317491 is about 68.2198048794.

It can be divided in two parts, 317 and 491, that added together give a palindrome (808).

The spelling of 317491 in words is "three hundred seventeen thousand, four hundred ninety-one".