318917 has 2 divisors, whose sum is σ = 318918. Its totient is φ = 318916.

The previous prime is 318911. The next prime is 318919. The reversal of 318917 is 719813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217156 + 101761 = 466^2 + 319^2 .

Together with 911 it forms a Wieferich pair.

It is an emirp because it is prime and its reverse (719813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318917 - 2¹⁶ = 253381 is a prime.

Together with 318919, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 318917.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318917.

It is not a weakly prime, because it can be changed into another prime (318911) 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, 159458 + 159459.

It is an arithmetic number, because the mean of its divisors is an integer number (159459).

2³¹⁸⁹¹⁷ is an apocalyptic number.

It is an amenable number.

318917 is a deficient number, since it is larger than the sum of its proper divisors (1).

318917 is an equidigital number, since it uses as much as digits as its factorization.

318917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 318917 is about 564.7273678511. The cubic root of 318917 is about 68.3217879893.

The spelling of 318917 in words is "three hundred eighteen thousand, nine hundred seventeen".