1311493369 has 2 divisors, whose sum is σ = 1311493370. Its totient is φ = 1311493368.

The previous prime is 1311493319. The next prime is 1311493423. The reversal of 1311493369 is 9633941131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 201270969 = 33320^2 + 14187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311493369 is a prime.

It is a super-2 number, since 2×1311493369² = 3440029713861940322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311493319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655746684 + 655746685.

It is an arithmetic number, because the mean of its divisors is an integer number (655746685).

Almost surely, 2^1311493369 is an apocalyptic number.

It is an amenable number.

1311493369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311493369 is an equidigital number, since it uses as much as digits as its factorization.

1311493369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 40.

The square root of 1311493369 is about 36214.5463729701. The cubic root of 1311493369 is about 1094.5998048278.

The spelling of 1311493369 in words is "one billion, three hundred eleven million, four hundred ninety-three thousand, three hundred sixty-nine".