315626137 has 2 divisors, whose sum is σ = 315626138. Its totient is φ = 315626136.

The previous prime is 315626117. The next prime is 315626141. The reversal of 315626137 is 731626513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314140176 + 1485961 = 17724^2 + 1219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315626137 is a prime.

It is not a weakly prime, because it can be changed into another prime (315626107) 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, 157813068 + 157813069.

It is an arithmetic number, because the mean of its divisors is an integer number (157813069).

Almost surely, 2^315626137 is an apocalyptic number.

It is an amenable number.

315626137 is a deficient number, since it is larger than the sum of its proper divisors (1).

315626137 is an equidigital number, since it uses as much as digits as its factorization.

315626137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 315626137 is about 17765.8700040274. The cubic root of 315626137 is about 680.8597379612.

The spelling of 315626137 in words is "three hundred fifteen million, six hundred twenty-six thousand, one hundred thirty-seven".