1312091312 has 40 divisors (see below), whose sum is σ = 3005536800. Its totient is φ = 542932992.

The previous prime is 1312091279. The next prime is 1312091317. The reversal of 1312091312 is 2131902131.

It is a super-2 number, since 2×1312091312² = 3443167222051762688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312091317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198737 + ... + 205232.

It is an arithmetic number, because the mean of its divisors is an integer number (75138420).

Almost surely, 2^1312091312 is an apocalyptic number.

It is an amenable number.

1312091312 is an abundant number, since it is smaller than the sum of its proper divisors (1693445488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312091312 is a wasteful number, since it uses less digits than its factorization.

1312091312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404013 (or 404007 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1312091312 is about 36222.8009960577. The cubic root of 1312091312 is about 1094.7661314655.

Adding to 1312091312 its reverse (2131902131), we get a palindrome (3443993443).

The spelling of 1312091312 in words is "one billion, three hundred twelve million, ninety-one thousand, three hundred twelve".