1317320311 has 2 divisors, whose sum is σ = 1317320312. Its totient is φ = 1317320310.

The previous prime is 1317320261. The next prime is 1317320321. The reversal of 1317320311 is 1130237131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1130237131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317320311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317320321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658660155 + 658660156.

It is an arithmetic number, because the mean of its divisors is an integer number (658660156).

Almost surely, 2^1317320311 is an apocalyptic number.

1317320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317320311 is an equidigital number, since it uses as much as digits as its factorization.

1317320311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1317320311 is about 36294.9075078034. The cubic root of 1317320311 is about 1096.2185058043.

Adding to 1317320311 its reverse (1130237131), we get a palindrome (2447557442).

The spelling of 1317320311 in words is "one billion, three hundred seventeen million, three hundred twenty thousand, three hundred eleven".