243738743 has 2 divisors, whose sum is σ = 243738744. Its totient is φ = 243738742.

The previous prime is 243738739. The next prime is 243738767. The reversal of 243738743 is 347837342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243738743 - 2² = 243738739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243738743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243738793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121869371 + 121869372.

It is an arithmetic number, because the mean of its divisors is an integer number (121869372).

Almost surely, 2^243738743 is an apocalyptic number.

243738743 is a deficient number, since it is larger than the sum of its proper divisors (1).

243738743 is an equidigital number, since it uses as much as digits as its factorization.

243738743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 41.

The square root of 243738743 is about 15612.1344793081. The cubic root of 243738743 is about 624.6568723493.

The spelling of 243738743 in words is "two hundred forty-three million, seven hundred thirty-eight thousand, seven hundred forty-three".