318359893 has 2 divisors, whose sum is σ = 318359894. Its totient is φ = 318359892.

The previous prime is 318359887. The next prime is 318359903. The reversal of 318359893 is 398953813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318194244 + 165649 = 17838^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 318359893 - 2⁵ = 318359861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318351893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159179946 + 159179947.

It is an arithmetic number, because the mean of its divisors is an integer number (159179947).

Almost surely, 2^318359893 is an apocalyptic number.

It is an amenable number.

318359893 is a deficient number, since it is larger than the sum of its proper divisors (1).

318359893 is an equidigital number, since it uses as much as digits as its factorization.

318359893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The square root of 318359893 is about 17842.6425453182. The cubic root of 318359893 is about 682.8198167467.

The spelling of 318359893 in words is "three hundred eighteen million, three hundred fifty-nine thousand, eight hundred ninety-three".