1323203543 has 2 divisors, whose sum is σ = 1323203544. Its totient is φ = 1323203542.

The previous prime is 1323203527. The next prime is 1323203591. The reversal of 1323203543 is 3453023231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323203543 - 2⁴ = 1323203527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323253543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661601771 + 661601772.

It is an arithmetic number, because the mean of its divisors is an integer number (661601772).

Almost surely, 2^1323203543 is an apocalyptic number.

1323203543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323203543 is an equidigital number, since it uses as much as digits as its factorization.

1323203543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 1323203543 is about 36375.8648419526. The cubic root of 1323203543 is about 1097.8480083862.

Adding to 1323203543 its reverse (3453023231), we get a palindrome (4776226774).

The spelling of 1323203543 in words is "one billion, three hundred twenty-three million, two hundred three thousand, five hundred forty-three".