318942361 has 2 divisors, whose sum is σ = 318942362. Its totient is φ = 318942360.

The previous prime is 318942359. The next prime is 318942367. The reversal of 318942361 is 163249813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318836736 + 105625 = 17856^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 318942361 - 2¹ = 318942359 is a prime.

Together with 318942359, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318942361.

It is not a weakly prime, because it can be changed into another prime (318942367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159471180 + 159471181.

It is an arithmetic number, because the mean of its divisors is an integer number (159471181).

Almost surely, 2^318942361 is an apocalyptic number.

It is an amenable number.

318942361 is a deficient number, since it is larger than the sum of its proper divisors (1).

318942361 is an equidigital number, since it uses as much as digits as its factorization.

318942361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 318942361 is about 17858.9574443751. The cubic root of 318942361 is about 683.2359897559.

The spelling of 318942361 in words is "three hundred eighteen million, nine hundred forty-two thousand, three hundred sixty-one".