1323140443 has 2 divisors, whose sum is σ = 1323140444. Its totient is φ = 1323140442.

The previous prime is 1323140437. The next prime is 1323140459. The reversal of 1323140443 is 3440413231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323140443 - 2²⁹ = 786269531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323146443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661570221 + 661570222.

It is an arithmetic number, because the mean of its divisors is an integer number (661570222).

Almost surely, 2^1323140443 is an apocalyptic number.

1323140443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323140443 is an equidigital number, since it uses as much as digits as its factorization.

1323140443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1323140443 is about 36374.9974982817. The cubic root of 1323140443 is about 1097.8305569742.

Adding to 1323140443 its reverse (3440413231), we get a palindrome (4763553674).

The spelling of 1323140443 in words is "one billion, three hundred twenty-three million, one hundred forty thousand, four hundred forty-three".