1311332293 has 2 divisors, whose sum is σ = 1311332294. Its totient is φ = 1311332292.

The previous prime is 1311332287. The next prime is 1311332317. The reversal of 1311332293 is 3922331131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123724484 + 187607809 = 33522^2 + 13697^2 .

It is an emirp because it is prime and its reverse (3922331131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311332293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311332203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655666146 + 655666147.

It is an arithmetic number, because the mean of its divisors is an integer number (655666147).

Almost surely, 2^1311332293 is an apocalyptic number.

It is an amenable number.

1311332293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311332293 is an equidigital number, since it uses as much as digits as its factorization.

1311332293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 28.

The square root of 1311332293 is about 36212.3223916942. The cubic root of 1311332293 is about 1094.5549905266.

The spelling of 1311332293 in words is "one billion, three hundred eleven million, three hundred thirty-two thousand, two hundred ninety-three".