243843 has 4 divisors (see below), whose sum is σ = 325128. Its totient is φ = 162560.

The previous prime is 243839. The next prime is 243851. The reversal of 243843 is 348342.

243843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243843 - 2² = 243839 is a prime.

It is a D-number.

243843 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243843.

It is not an unprimeable number, because it can be changed into a prime (243863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40638 + ... + 40643.

It is an arithmetic number, because the mean of its divisors is an integer number (81282).

2²⁴³⁸⁴³ is an apocalyptic number.

243843 is a deficient number, since it is larger than the sum of its proper divisors (81285).

243843 is an equidigital number, since it uses as much as digits as its factorization.

243843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81284.

The product of its digits is 2304, while the sum is 24.

The square root of 243843 is about 493.8046172324. The cubic root of 243843 is about 62.4745923393.

The spelling of 243843 in words is "two hundred forty-three thousand, eight hundred forty-three".