1312112313 has 6 divisors (see below), whose sum is σ = 1895273354. Its totient is φ = 874741536.

The previous prime is 1312112297. The next prime is 1312112339. The reversal of 1312112313 is 3132112131.

It can be written as a sum of positive squares in only one way, i.e., 764411904 + 547700409 = 27648^2 + 23403^2 .

It is not a de Polignac number, because 1312112313 - 2⁴ = 1312112297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312112413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72895120 + ... + 72895137.

Almost surely, 2^1312112313 is an apocalyptic number.

It is an amenable number.

1312112313 is a deficient number, since it is larger than the sum of its proper divisors (583161041).

1312112313 is a wasteful number, since it uses less digits than its factorization.

1312112313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145790263 (or 145790260 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1312112313 is about 36223.0908813701. The cubic root of 1312112313 is about 1094.7719722838.

Adding to 1312112313 its reverse (3132112131), we get a palindrome (4444224444).

The spelling of 1312112313 in words is "one billion, three hundred twelve million, one hundred twelve thousand, three hundred thirteen".