1312168369 has 4 divisors (see below), whose sum is σ = 1319418100. Its totient is φ = 1304918640.

The previous prime is 1312168337. The next prime is 1312168379. The reversal of 1312168369 is 9638612131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9638612131 = 83 ⋅116127857.

It can be written as a sum of positive squares in 2 ways, for example, as 379782144 + 932386225 = 19488^2 + 30535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312168369 - 2⁵ = 1312168337 is a prime.

It is a super-2 number, since 2×1312168369² = 3443571657208240322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312168379) 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, 3624594 + ... + 3624955.

It is an arithmetic number, because the mean of its divisors is an integer number (329854525).

Almost surely, 2^1312168369 is an apocalyptic number.

It is an amenable number.

1312168369 is a deficient number, since it is larger than the sum of its proper divisors (7249731).

1312168369 is an equidigital number, since it uses as much as digits as its factorization.

1312168369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7249730.

The product of its digits is 46656, while the sum is 40.

The square root of 1312168369 is about 36223.8646336914. The cubic root of 1312168369 is about 1094.7875623273.

The spelling of 1312168369 in words is "one billion, three hundred twelve million, one hundred sixty-eight thousand, three hundred sixty-nine".