318559 has 2 divisors, whose sum is σ = 318560. Its totient is φ = 318558.

The previous prime is 318557. The next prime is 318569. The reversal of 318559 is 955813.

It is a weak prime.

It is an emirp because it is prime and its reverse (955813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318559 - 2¹ = 318557 is a prime.

Together with 318557, it forms a pair of twin primes.

It is a Chen prime.

318559 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 318559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159279 + 159280.

It is an arithmetic number, because the mean of its divisors is an integer number (159280).

2³¹⁸⁵⁵⁹ is an apocalyptic number.

318559 is a deficient number, since it is larger than the sum of its proper divisors (1).

318559 is an equidigital number, since it uses as much as digits as its factorization.

318559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 318559 is about 564.4103117414. The cubic root of 318559 is about 68.2962135629.

The spelling of 318559 in words is "three hundred eighteen thousand, five hundred fifty-nine".