315660689 has 2 divisors, whose sum is σ = 315660690. Its totient is φ = 315660688.

The previous prime is 315660649. The next prime is 315660713. The reversal of 315660689 is 986066513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222248464 + 93412225 = 14908^2 + 9665^2 .

It is a cyclic number.

It is not a de Polignac number, because 315660689 - 2²⁰ = 314612113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315660619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157830344 + 157830345.

It is an arithmetic number, because the mean of its divisors is an integer number (157830345).

Almost surely, 2^315660689 is an apocalyptic number.

It is an amenable number.

315660689 is a deficient number, since it is larger than the sum of its proper divisors (1).

315660689 is an equidigital number, since it uses as much as digits as its factorization.

315660689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 315660689 is about 17766.8424037588. The cubic root of 315660689 is about 680.8845819190.

The spelling of 315660689 in words is "three hundred fifteen million, six hundred sixty thousand, six hundred eighty-nine".