315638429 has 2 divisors, whose sum is σ = 315638430. Its totient is φ = 315638428.

The previous prime is 315638399. The next prime is 315638441. The reversal of 315638429 is 924836513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312405625 + 3232804 = 17675^2 + 1798^2 .

It is an emirp because it is prime and its reverse (924836513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315638429 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315638489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157819214 + 157819215.

It is an arithmetic number, because the mean of its divisors is an integer number (157819215).

Almost surely, 2^315638429 is an apocalyptic number.

It is an amenable number.

315638429 is a deficient number, since it is larger than the sum of its proper divisors (1).

315638429 is an equidigital number, since it uses as much as digits as its factorization.

315638429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 315638429 is about 17766.2159448770. The cubic root of 315638429 is about 680.8685764976.

The spelling of 315638429 in words is "three hundred fifteen million, six hundred thirty-eight thousand, four hundred twenty-nine".