318589 has 2 divisors, whose sum is σ = 318590. Its totient is φ = 318588.

The previous prime is 318581. The next prime is 318601. The reversal of 318589 is 985813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311364 + 7225 = 558^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 318589 - 2³ = 318581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159294 + 159295.

It is an arithmetic number, because the mean of its divisors is an integer number (159295).

2³¹⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

318589 is a deficient number, since it is larger than the sum of its proper divisors (1).

318589 is an equidigital number, since it uses as much as digits as its factorization.

318589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 318589 is about 564.4368875260. The cubic root of 318589 is about 68.2983574066.

The spelling of 318589 in words is "three hundred eighteen thousand, five hundred eighty-nine".