317923 has 2 divisors, whose sum is σ = 317924. Its totient is φ = 317922.

The previous prime is 317921. The next prime is 317957. The reversal of 317923 is 329713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 317923 - 2¹ = 317921 is a prime.

Together with 317921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (317921) 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, 158961 + 158962.

It is an arithmetic number, because the mean of its divisors is an integer number (158962).

2³¹⁷⁹²³ is an apocalyptic number.

317923 is a deficient number, since it is larger than the sum of its proper divisors (1).

317923 is an equidigital number, since it uses as much as digits as its factorization.

317923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 25.

The square root of 317923 is about 563.8466103472. The cubic root of 317923 is about 68.2507323692.

The spelling of 317923 in words is "three hundred seventeen thousand, nine hundred twenty-three".