43839 has 6 divisors (see below), whose sum is σ = 63336. Its totient is φ = 29220.

The previous prime is 43801. The next prime is 43853. The reversal of 43839 is 93834.

It is not a de Polignac number, because 43839 - 2⁷ = 43711 is a prime.

43839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2427 + ... + 2444.

It is an arithmetic number, because the mean of its divisors is an integer number (10556).

2⁴³⁸³⁹ is an apocalyptic number.

43839 is a deficient number, since it is larger than the sum of its proper divisors (19497).

43839 is a wasteful number, since it uses less digits than its factorization.

43839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877 (or 4874 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 43839 is about 209.3776492370. The cubic root of 43839 is about 35.2603711750.

The spelling of 43839 in words is "forty-three thousand, eight hundred thirty-nine".