1312320323 has 4 divisors (see below), whose sum is σ = 1340242080. Its totient is φ = 1284398568.

The previous prime is 1312320319. The next prime is 1312320349. The reversal of 1312320323 is 3230232131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312320323 - 2² = 1312320319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312320295 and 1312320304.

It is not an unprimeable number, because it can be changed into a prime (1312320523) 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, 13960808 + ... + 13960901.

It is an arithmetic number, because the mean of its divisors is an integer number (335060520).

Almost surely, 2^1312320323 is an apocalyptic number.

1312320323 is a deficient number, since it is larger than the sum of its proper divisors (27921757).

1312320323 is an equidigital number, since it uses as much as digits as its factorization.

1312320323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27921756.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1312320323 is about 36225.9620024093. The cubic root of 1312320323 is about 1094.8298208595.

Adding to 1312320323 its reverse (3230232131), we get a palindrome (4542552454).

The spelling of 1312320323 in words is "one billion, three hundred twelve million, three hundred twenty thousand, three hundred twenty-three".