1312997713 has 2 divisors, whose sum is σ = 1312997714. Its totient is φ = 1312997712.

The previous prime is 1312997681. The next prime is 1312997747. The reversal of 1312997713 is 3177992131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926167489 + 386830224 = 30433^2 + 19668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312997713 - 2⁵ = 1312997681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312997713.

It is not a weakly prime, because it can be changed into another prime (1312997773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656498856 + 656498857.

It is an arithmetic number, because the mean of its divisors is an integer number (656498857).

Almost surely, 2^1312997713 is an apocalyptic number.

It is an amenable number.

1312997713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312997713 is an equidigital number, since it uses as much as digits as its factorization.

1312997713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 43.

The square root of 1312997713 is about 36235.3103063848. The cubic root of 1312997713 is about 1095.0181639016.

The spelling of 1312997713 in words is "one billion, three hundred twelve million, nine hundred ninety-seven thousand, seven hundred thirteen".