1312162393 has 4 divisors (see below), whose sum is σ = 1336920228. Its totient is φ = 1287404560.

The previous prime is 1312162381. The next prime is 1312162421. The reversal of 1312162393 is 3932612131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 997738569 + 314423824 = 31587^2 + 17732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312162393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312162303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12378838 + ... + 12378943.

It is an arithmetic number, because the mean of its divisors is an integer number (334230057).

Almost surely, 2^1312162393 is an apocalyptic number.

It is an amenable number.

1312162393 is a deficient number, since it is larger than the sum of its proper divisors (24757835).

1312162393 is an equidigital number, since it uses as much as digits as its factorization.

1312162393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24757834.

The product of its digits is 5832, while the sum is 31.

The square root of 1312162393 is about 36223.7821465401. The cubic root of 1312162393 is about 1094.7859003301.

The spelling of 1312162393 in words is "one billion, three hundred twelve million, one hundred sixty-two thousand, three hundred ninety-three".