1323120443 has 4 divisors (see below), whose sum is σ = 1329391368. Its totient is φ = 1316849520.

The previous prime is 1323120427. The next prime is 1323120467. The reversal of 1323120443 is 3440213231.

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 1323120443 - 2⁴ = 1323120427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323120413) 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, 3135146 + ... + 3135567.

It is an arithmetic number, because the mean of its divisors is an integer number (332347842).

Almost surely, 2^1323120443 is an apocalyptic number.

1323120443 is a deficient number, since it is larger than the sum of its proper divisors (6270925).

1323120443 is an equidigital number, since it uses as much as digits as its factorization.

1323120443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270924.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1323120443 is about 36374.7225831346. The cubic root of 1323120443 is about 1097.8250255075.

Adding to 1323120443 its reverse (3440213231), we get a palindrome (4763333674).

The spelling of 1323120443 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, four hundred forty-three".