1311646613 has 2 divisors, whose sum is σ = 1311646614. Its totient is φ = 1311646612.

The previous prime is 1311646603. The next prime is 1311646639. The reversal of 1311646613 is 3166461131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308847684 + 2798929 = 36178^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311646613 - 2¹⁰ = 1311645589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311646613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311646603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655823306 + 655823307.

It is an arithmetic number, because the mean of its divisors is an integer number (655823307).

Almost surely, 2^1311646613 is an apocalyptic number.

It is an amenable number.

1311646613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311646613 is an equidigital number, since it uses as much as digits as its factorization.

1311646613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1311646613 is about 36216.6620908112. The cubic root of 1311646613 is about 1094.6424367169.

The spelling of 1311646613 in words is "one billion, three hundred eleven million, six hundred forty-six thousand, six hundred thirteen".