1315375309 has 2 divisors, whose sum is σ = 1315375310. Its totient is φ = 1315375308.

The previous prime is 1315375307. The next prime is 1315375319. The reversal of 1315375309 is 9035735131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857201284 + 458174025 = 29278^2 + 21405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315375309 - 2¹ = 1315375307 is a prime.

Together with 1315375307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315375307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657687654 + 657687655.

It is an arithmetic number, because the mean of its divisors is an integer number (657687655).

Almost surely, 2^1315375309 is an apocalyptic number.

It is an amenable number.

1315375309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315375309 is an equidigital number, since it uses as much as digits as its factorization.

1315375309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42525, while the sum is 37.

The square root of 1315375309 is about 36268.1031899933. The cubic root of 1315375309 is about 1095.6787237963.

The spelling of 1315375309 in words is "one billion, three hundred fifteen million, three hundred seventy-five thousand, three hundred nine".