1317398647 has 2 divisors, whose sum is σ = 1317398648. Its totient is φ = 1317398646.

The previous prime is 1317398627. The next prime is 1317398657. The reversal of 1317398647 is 7468937131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1317398647 - 2⁷ = 1317398519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317398647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317398617) 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, 658699323 + 658699324.

It is an arithmetic number, because the mean of its divisors is an integer number (658699324).

Almost surely, 2^1317398647 is an apocalyptic number.

1317398647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317398647 is an equidigital number, since it uses as much as digits as its factorization.

1317398647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 1317398647 is about 36295.9866514192. The cubic root of 1317398647 is about 1096.2402346807.

The spelling of 1317398647 in words is "one billion, three hundred seventeen million, three hundred ninety-eight thousand, six hundred forty-seven".