315638663 has 2 divisors, whose sum is σ = 315638664. Its totient is φ = 315638662.

The previous prime is 315638629. The next prime is 315638669. The reversal of 315638663 is 366836513.

It is a strong prime.

It is an emirp because it is prime and its reverse (366836513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315638663 - 2²² = 311444359 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315638663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315638669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157819331 + 157819332.

It is an arithmetic number, because the mean of its divisors is an integer number (157819332).

Almost surely, 2^315638663 is an apocalyptic number.

315638663 is a deficient number, since it is larger than the sum of its proper divisors (1).

315638663 is an equidigital number, since it uses as much as digits as its factorization.

315638663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 315638663 is about 17766.2225304087. Note that the first 3 decimals coincide. The cubic root of 315638663 is about 680.8687447526.

The spelling of 315638663 in words is "three hundred fifteen million, six hundred thirty-eight thousand, six hundred sixty-three".