243329 has 4 divisors (see below), whose sum is σ = 247380. Its totient is φ = 239280.

The previous prime is 243311. The next prime is 243343. The reversal of 243329 is 923342.

243329 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 can be written as a sum of positive squares in 2 ways, for example, as 49729 + 193600 = 223^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 243329 - 2⁸ = 243073 is a prime.

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 243329.

It is not an unprimeable number, because it can be changed into a prime (243829) 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, 1934 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (61845).

2²⁴³³²⁹ is an apocalyptic number.

It is an amenable number.

243329 is a deficient number, since it is larger than the sum of its proper divisors (4051).

243329 is an equidigital number, since it uses as much as digits as its factorization.

243329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050.

The product of its digits is 1296, while the sum is 23.

The square root of 243329 is about 493.2838939191. The cubic root of 243329 is about 62.4306644431.

The spelling of 243329 in words is "two hundred forty-three thousand, three hundred twenty-nine".