243403432423 has 2 divisors, whose sum is σ = 243403432424. Its totient is φ = 243403432422.

The previous prime is 243403432421. The next prime is 243403432451. The reversal of 243403432423 is 324234304342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243403432423 - 2¹ = 243403432421 is a prime.

Together with 243403432421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243403432421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121701716211 + 121701716212.

It is an arithmetic number, because the mean of its divisors is an integer number (121701716212).

Almost surely, 2^243403432423 is an apocalyptic number.

243403432423 is a deficient number, since it is larger than the sum of its proper divisors (1).

243403432423 is an equidigital number, since it uses as much as digits as its factorization.

243403432423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 34.

Adding to 243403432423 its reverse (324234304342), we get a palindrome (567637736765).

The spelling of 243403432423 in words is "two hundred forty-three billion, four hundred three million, four hundred thirty-two thousand, four hundred twenty-three".