243873 has 24 divisors (see below), whose sum is σ = 416000. Its totient is φ = 137592.

The previous prime is 243871. The next prime is 243889. The reversal of 243873 is 378342.

243873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243873 - 2¹ = 243871 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁶ + 8⁵ + 3⁴ + 7⁵ + 3¹⁰ .

It is a Duffinian number.

243873 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 243873.

It is not an unprimeable number, because it can be changed into a prime (243871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3048 + ... + 3126.

2²⁴³⁸⁷³ is an apocalyptic number.

It is an amenable number.

243873 is a deficient number, since it is larger than the sum of its proper divisors (172127).

243873 is an equidigital number, since it uses as much as digits as its factorization.

243873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 89 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 243873 is about 493.8349926848. The cubic root of 243873 is about 62.4771543169.

The spelling of 243873 in words is "two hundred forty-three thousand, eight hundred seventy-three".