1317540013 has 2 divisors, whose sum is σ = 1317540014. Its totient is φ = 1317540012.

The previous prime is 1317539983. The next prime is 1317540017. The reversal of 1317540013 is 3100457131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002228964 + 315311049 = 31658^2 + 17757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317540013 - 2⁹ = 1317539501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317540013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317540017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658770006 + 658770007.

It is an arithmetic number, because the mean of its divisors is an integer number (658770007).

Almost surely, 2^1317540013 is an apocalyptic number.

It is an amenable number.

1317540013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317540013 is an equidigital number, since it uses as much as digits as its factorization.

1317540013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1317540013 is about 36297.9340045684. The cubic root of 1317540013 is about 1096.2794446684.

Adding to 1317540013 its reverse (3100457131), we get a palindrome (4417997144).

The spelling of 1317540013 in words is "one billion, three hundred seventeen million, five hundred forty thousand, thirteen".