1312056313 has 4 divisors (see below), whose sum is σ = 1312132608. Its totient is φ = 1311980020.

The previous prime is 1312056269. The next prime is 1312056331. The reversal of 1312056313 is 3136502131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312056313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312056353) 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 in 3 ways as a sum of consecutive naturals, for example, 1128 + ... + 51238.

It is an arithmetic number, because the mean of its divisors is an integer number (328033152).

Almost surely, 2^1312056313 is an apocalyptic number.

It is an amenable number.

1312056313 is a deficient number, since it is larger than the sum of its proper divisors (76295).

1312056313 is an equidigital number, since it uses as much as digits as its factorization.

1312056313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76294.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1312056313 is about 36222.3178855247. The cubic root of 1312056313 is about 1094.7563973715.

Adding to 1312056313 its reverse (3136502131), we get a palindrome (4448558444).

The spelling of 1312056313 in words is "one billion, three hundred twelve million, fifty-six thousand, three hundred thirteen".