243043943 has 2 divisors, whose sum is σ = 243043944. Its totient is φ = 243043942.

The previous prime is 243043939. The next prime is 243043961. The reversal of 243043943 is 349340342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243043943 - 2² = 243043939 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243043963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521971 + 121521972.

It is an arithmetic number, because the mean of its divisors is an integer number (121521972).

Almost surely, 2^243043943 is an apocalyptic number.

243043943 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043943 is an equidigital number, since it uses as much as digits as its factorization.

243043943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 243043943 is about 15589.8666767872. The cubic root of 243043943 is about 624.0627599255.

The spelling of 243043943 in words is "two hundred forty-three million, forty-three thousand, nine hundred forty-three".