315744137 has 2 divisors, whose sum is σ = 315744138. Its totient is φ = 315744136.

The previous prime is 315744089. The next prime is 315744211. The reversal of 315744137 is 731447513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190550416 + 125193721 = 13804^2 + 11189^2 .

It is a cyclic number.

It is not a de Polignac number, because 315744137 - 2²⁰ = 314695561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315744097 and 315744106.

It is not a weakly prime, because it can be changed into another prime (315740137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157872068 + 157872069.

It is an arithmetic number, because the mean of its divisors is an integer number (157872069).

Almost surely, 2^315744137 is an apocalyptic number.

It is an amenable number.

315744137 is a deficient number, since it is larger than the sum of its proper divisors (1).

315744137 is an equidigital number, since it uses as much as digits as its factorization.

315744137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 315744137 is about 17769.1906681199. The cubic root of 315744137 is about 680.9445761391.

The spelling of 315744137 in words is "three hundred fifteen million, seven hundred forty-four thousand, one hundred thirty-seven".