243443243 has 2 divisors, whose sum is σ = 243443244. Its totient is φ = 243443242.

The previous prime is 243443231. The next prime is 243443251. The reversal of 243443243 is 342344342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243443243 - 2⁸ = 243442987 is a prime.

It is a super-2 number, since 2×243443243² = 118529225124714098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243443843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121721621 + 121721622.

It is an arithmetic number, because the mean of its divisors is an integer number (121721622).

Almost surely, 2^243443243 is an apocalyptic number.

243443243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243443243 is an equidigital number, since it uses as much as digits as its factorization.

243443243 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 243443243 is about 15602.6678167549. The cubic root of 243443243 is about 624.4043331633.

Adding to 243443243 its reverse (342344342), we get a palindrome (585787585).

The spelling of 243443243 in words is "two hundred forty-three million, four hundred forty-three thousand, two hundred forty-three".