1312323143 has 16 divisors (see below), whose sum is σ = 1421328384. Its totient is φ = 1206936960.

The previous prime is 1312323119. The next prime is 1312323197. The reversal of 1312323143 is 3413232131.

It is a cyclic number.

It is not a de Polignac number, because 1312323143 - 2⁶ = 1312323079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312325143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867758 + ... + 869268.

It is an arithmetic number, because the mean of its divisors is an integer number (88833024).

Almost surely, 2^1312323143 is an apocalyptic number.

1312323143 is a deficient number, since it is larger than the sum of its proper divisors (109005241).

1312323143 is a wasteful number, since it uses less digits than its factorization.

1312323143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662.

The product of its digits is 1296, while the sum is 23.

The square root of 1312323143 is about 36226.0009247502. Note that the first 3 decimals coincide. The cubic root of 1312323143 is about 1094.8306050730.

Adding to 1312323143 its reverse (3413232131), we get a palindrome (4725555274).

The spelling of 1312323143 in words is "one billion, three hundred twelve million, three hundred twenty-three thousand, one hundred forty-three".