318313 has 2 divisors, whose sum is σ = 318314. Its totient is φ = 318312.

The previous prime is 318301. The next prime is 318319. The reversal of 318313 is 313813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262144 + 56169 = 512^2 + 237^2 .

It is a cyclic number.

It is not a de Polignac number, because 318313 - 2⁵ = 318281 is a prime.

It is not a weakly prime, because it can be changed into another prime (318319) 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, 159156 + 159157.

It is an arithmetic number, because the mean of its divisors is an integer number (159157).

2³¹⁸³¹³ is an apocalyptic number.

It is an amenable number.

318313 is a deficient number, since it is larger than the sum of its proper divisors (1).

318313 is an equidigital number, since it uses as much as digits as its factorization.

318313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 318313 is about 564.1923430888. The cubic root of 318313 is about 68.2786289657.

The spelling of 318313 in words is "three hundred eighteen thousand, three hundred thirteen".