1315926613 has 2 divisors, whose sum is σ = 1315926614. Its totient is φ = 1315926612.

The previous prime is 1315926607. The next prime is 1315926641. The reversal of 1315926613 is 3166295131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022592484 + 293334129 = 31978^2 + 17127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315926613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315926673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657963306 + 657963307.

It is an arithmetic number, because the mean of its divisors is an integer number (657963307).

Almost surely, 2^1315926613 is an apocalyptic number.

It is an amenable number.

1315926613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315926613 is an equidigital number, since it uses as much as digits as its factorization.

1315926613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 1315926613 is about 36275.7027912624. The cubic root of 1315926613 is about 1095.8317771208.

The spelling of 1315926613 in words is "one billion, three hundred fifteen million, nine hundred twenty-six thousand, six hundred thirteen".