315969439 has 2 divisors, whose sum is σ = 315969440. Its totient is φ = 315969438.

The previous prime is 315969403. The next prime is 315969443. The reversal of 315969439 is 934969513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315969439 - 2²⁷ = 181751711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315969392 and 315969401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315960439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157984719 + 157984720.

It is an arithmetic number, because the mean of its divisors is an integer number (157984720).

Almost surely, 2^315969439 is an apocalyptic number.

315969439 is a deficient number, since it is larger than the sum of its proper divisors (1).

315969439 is an equidigital number, since it uses as much as digits as its factorization.

315969439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 315969439 is about 17775.5292185634. The cubic root of 315969439 is about 681.1065022900.

The spelling of 315969439 in words is "three hundred fifteen million, nine hundred sixty-nine thousand, four hundred thirty-nine".