1312431337 has 48 divisors (see below), whose sum is σ = 1654076160. Its totient is φ = 1036046592.

The previous prime is 1312431317. The next prime is 1312431343. The reversal of 1312431337 is 7331342131.

It is a de Polignac number, because none of the positive numbers 2^k-1312431337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312431317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2871613 + ... + 2872069.

It is an arithmetic number, because the mean of its divisors is an integer number (34459920).

Almost surely, 2^1312431337 is an apocalyptic number.

It is an amenable number.

1312431337 is a deficient number, since it is larger than the sum of its proper divisors (341644823).

1312431337 is a wasteful number, since it uses less digits than its factorization.

1312431337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 583 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 1312431337 is about 36227.4942136494. The cubic root of 1312431337 is about 1094.8606918820.

Adding to 1312431337 its reverse (7331342131), we get a palindrome (8643773468).

The spelling of 1312431337 in words is "one billion, three hundred twelve million, four hundred thirty-one thousand, three hundred thirty-seven".