1315807919 has 2 divisors, whose sum is σ = 1315807920. Its totient is φ = 1315807918.

The previous prime is 1315807891. The next prime is 1315807937. The reversal of 1315807919 is 9197085131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1315807919 - 2⁸ = 1315807663 is a prime.

It is a super-2 number, since 2×1315807919² = 3462700959406221122, which contains 22 as substring.

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 1315807919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315807979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657903959 + 657903960.

It is an arithmetic number, because the mean of its divisors is an integer number (657903960).

Almost surely, 2^1315807919 is an apocalyptic number.

1315807919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315807919 is an equidigital number, since it uses as much as digits as its factorization.

1315807919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1315807919 is about 36274.0667557416. The cubic root of 1315807919 is about 1095.7988288377.

The spelling of 1315807919 in words is "one billion, three hundred fifteen million, eight hundred seven thousand, nine hundred nineteen".