1312344123 has 4 divisors (see below), whose sum is σ = 1749792168. Its totient is φ = 874896080.

The previous prime is 1312344119. The next prime is 1312344149. The reversal of 1312344123 is 3214432131.

It is a happy number.

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 1312344123 - 2² = 1312344119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312344093 and 1312344102.

It is not an unprimeable number, because it can be changed into a prime (1312344023) 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, 218724018 + ... + 218724023.

It is an arithmetic number, because the mean of its divisors is an integer number (437448042).

Almost surely, 2^1312344123 is an apocalyptic number.

1312344123 is a deficient number, since it is larger than the sum of its proper divisors (437448045).

1312344123 is an equidigital number, since it uses as much as digits as its factorization.

1312344123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437448044.

The product of its digits is 1728, while the sum is 24.

The square root of 1312344123 is about 36226.2904946118. The cubic root of 1312344123 is about 1094.8364393636.

Adding to 1312344123 its reverse (3214432131), we get a palindrome (4526776254).

The spelling of 1312344123 in words is "one billion, three hundred twelve million, three hundred forty-four thousand, one hundred twenty-three".