315612709 has 2 divisors, whose sum is σ = 315612710. Its totient is φ = 315612708.

The previous prime is 315612691. The next prime is 315612749. The reversal of 315612709 is 907216513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201015684 + 114597025 = 14178^2 + 10705^2 .

It is a cyclic number.

It is not a de Polignac number, because 315612709 - 2⁵ = 315612677 is a prime.

It is a super-2 number, since 2×315612709² = 199222764164637362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315612749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157806354 + 157806355.

It is an arithmetic number, because the mean of its divisors is an integer number (157806355).

Almost surely, 2^315612709 is an apocalyptic number.

It is an amenable number.

315612709 is a deficient number, since it is larger than the sum of its proper divisors (1).

315612709 is an equidigital number, since it uses as much as digits as its factorization.

315612709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 315612709 is about 17765.4920843753. The cubic root of 315612709 is about 680.8500823242.

The spelling of 315612709 in words is "three hundred fifteen million, six hundred twelve thousand, seven hundred nine".