243389 has 8 divisors (see below), whose sum is σ = 262080. Its totient is φ = 225216.

The previous prime is 243367. The next prime is 243391. The reversal of 243389 is 983342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-243389 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 4⁸ + 3⁴ + 3¹¹ + 8³ + 9² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2²⁴³³⁸⁹ is an apocalyptic number.

It is an amenable number.

243389 is a deficient number, since it is larger than the sum of its proper divisors (18691).

243389 is a wasteful number, since it uses less digits than its factorization.

243389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its digits is 5184, while the sum is 29.

The square root of 243389 is about 493.3447070761. The cubic root of 243389 is about 62.4357954002.

The spelling of 243389 in words is "two hundred forty-three thousand, three hundred eighty-nine".