243985743 has 8 divisors (see below), whose sum is σ = 361460400. Its totient is φ = 162657144.

The previous prime is 243985723. The next prime is 243985747. The reversal of 243985743 is 347589342.

It is not a de Polignac number, because 243985743 - 2¹⁶ = 243920207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243985747) 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 in 7 ways as a sum of consecutive naturals, for example, 4518228 + ... + 4518281.

It is an arithmetic number, because the mean of its divisors is an integer number (45182550).

Almost surely, 2^243985743 is an apocalyptic number.

243985743 is a deficient number, since it is larger than the sum of its proper divisors (117474657).

243985743 is an equidigital number, since it uses as much as digits as its factorization.

243985743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036518 (or 9036512 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 243985743 is about 15620.0429896976. The cubic root of 243985743 is about 624.8678060683.

The spelling of 243985743 in words is "two hundred forty-three million, nine hundred eighty-five thousand, seven hundred forty-three".