1312744319 has 4 divisors (see below), whose sum is σ = 1322765400. Its totient is φ = 1302723240.

The previous prime is 1312744309. The next prime is 1312744331. The reversal of 1312744319 is 9134472131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312744319 is a prime.

It is a super-2 number, since 2×1312744319² = 3446595294133547522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312744309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5010344 + ... + 5010605.

It is an arithmetic number, because the mean of its divisors is an integer number (330691350).

Almost surely, 2^1312744319 is an apocalyptic number.

1312744319 is a deficient number, since it is larger than the sum of its proper divisors (10021081).

1312744319 is a wasteful number, since it uses less digits than its factorization.

1312744319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021080.

The product of its digits is 18144, while the sum is 35.

The square root of 1312744319 is about 36231.8136311171. The cubic root of 1312744319 is about 1094.9477172482.

The spelling of 1312744319 in words is "one billion, three hundred twelve million, seven hundred forty-four thousand, three hundred nineteen".