1323299943 has 16 divisors (see below), whose sum is σ = 2240508160. Its totient is φ = 756171288.

The previous prime is 1323299921. The next prime is 1323299987. The reversal of 1323299943 is 3499923231.

It is not a de Polignac number, because 1323299943 - 2¹² = 1323295847 is a prime.

It is a super-2 number, since 2×1323299943² = 3502245478287606498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323299443) 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, 3500605 + ... + 3500982.

It is an arithmetic number, because the mean of its divisors is an integer number (140031760).

Almost surely, 2^1323299943 is an apocalyptic number.

1323299943 is a deficient number, since it is larger than the sum of its proper divisors (917208217).

1323299943 is an equidigital number, since it uses as much as digits as its factorization.

1323299943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001603 (or 7001597 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 1323299943 is about 36377.1898722262. The cubic root of 1323299943 is about 1097.8746684262.

The spelling of 1323299943 in words is "one billion, three hundred twenty-three million, two hundred ninety-nine thousand, nine hundred forty-three".