243423443 has 4 divisors (see below), whose sum is σ = 243454848. Its totient is φ = 243392040.

The previous prime is 243423431. The next prime is 243423449. The reversal of 243423443 is 344324342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243423443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243423449) 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 in 3 ways as a sum of consecutive naturals, for example, 5198 + ... + 22668.

It is an arithmetic number, because the mean of its divisors is an integer number (60863712).

Almost surely, 2^243423443 is an apocalyptic number.

243423443 is a deficient number, since it is larger than the sum of its proper divisors (31405).

243423443 is a wasteful number, since it uses less digits than its factorization.

243423443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31404.

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

The square root of 243423443 is about 15602.0332969777. The cubic root of 243423443 is about 624.3874044522.

Adding to 243423443 its reverse (344324342), we get a palindrome (587747785).

The spelling of 243423443 in words is "two hundred forty-three million, four hundred twenty-three thousand, four hundred forty-three".