243705743 has 2 divisors, whose sum is σ = 243705744. Its totient is φ = 243705742.

The previous prime is 243705731. The next prime is 243705751. The reversal of 243705743 is 347507342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243705743 - 2²² = 239511439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243705703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121852871 + 121852872.

It is an arithmetic number, because the mean of its divisors is an integer number (121852872).

Almost surely, 2^243705743 is an apocalyptic number.

243705743 is a deficient number, since it is larger than the sum of its proper divisors (1).

243705743 is an equidigital number, since it uses as much as digits as its factorization.

243705743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 243705743 is about 15611.0775733131. The cubic root of 243705743 is about 624.6286801315.

The spelling of 243705743 in words is "two hundred forty-three million, seven hundred five thousand, seven hundred forty-three".