243243443 has 2 divisors, whose sum is σ = 243243444. Its totient is φ = 243243442.

The previous prime is 243243437. The next prime is 243243479. The reversal of 243243443 is 344342342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243243443 - 2¹⁴ = 243227059 is a prime.

It is not a weakly prime, because it can be changed into another prime (243243493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621721 + 121621722.

It is an arithmetic number, because the mean of its divisors is an integer number (121621722).

Almost surely, 2^243243443 is an apocalyptic number.

243243443 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243443 is an equidigital number, since it uses as much as digits as its factorization.

243243443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 29.

The square root of 243243443 is about 15596.2637512963. The cubic root of 243243443 is about 624.2334649561.

Adding to 243243443 its reverse (344342342), we get a palindrome (587585785).

The spelling of 243243443 in words is "two hundred forty-three million, two hundred forty-three thousand, four hundred forty-three".