318344137 has 2 divisors, whose sum is σ = 318344138. Its totient is φ = 318344136.

The previous prime is 318344123. The next prime is 318344141. The reversal of 318344137 is 731443813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313254601 + 5089536 = 17699^2 + 2256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318344137 is a prime.

It is not a weakly prime, because it can be changed into another prime (318344197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159172068 + 159172069.

It is an arithmetic number, because the mean of its divisors is an integer number (159172069).

Almost surely, 2^318344137 is an apocalyptic number.

It is an amenable number.

318344137 is a deficient number, since it is larger than the sum of its proper divisors (1).

318344137 is an equidigital number, since it uses as much as digits as its factorization.

318344137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 318344137 is about 17842.2010133279. The cubic root of 318344137 is about 682.8085520462.

The spelling of 318344137 in words is "three hundred eighteen million, three hundred forty-four thousand, one hundred thirty-seven".