243849 has 4 divisors (see below), whose sum is σ = 325136. Its totient is φ = 162564.

The previous prime is 243839. The next prime is 243851. The reversal of 243849 is 948342.

It is a happy number.

243849 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243849 - 2¹² = 239753 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243849.

It is not an unprimeable number, because it can be changed into a prime (243809) 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, 40639 + ... + 40644.

It is an arithmetic number, because the mean of its divisors is an integer number (81284).

2²⁴³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

243849 is a deficient number, since it is larger than the sum of its proper divisors (81287).

243849 is an equidigital number, since it uses as much as digits as its factorization.

243849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81286.

The product of its digits is 6912, while the sum is 30.

The square root of 243849 is about 493.8106924723. The cubic root of 243849 is about 62.4751047516.

The spelling of 243849 in words is "two hundred forty-three thousand, eight hundred forty-nine".