43389 has 8 divisors (see below), whose sum is σ = 64320. Its totient is φ = 28908.

The previous prime is 43331. The next prime is 43391. The reversal of 43389 is 98334.

It is not a de Polignac number, because 43389 - 2⁷ = 43261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1607 = 43389 / (4 + 3 + 3 + 8 + 9).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (8040).

2⁴³³⁸⁹ is an apocalyptic number.

It is an amenable number.

43389 is a deficient number, since it is larger than the sum of its proper divisors (20931).

43389 is a wasteful number, since it uses less digits than its factorization.

43389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1610 counting only the distinct ones).

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

The square root of 43389 is about 208.3002640421. The cubic root of 43389 is about 35.1393087265.

Subtracting 43389 from its reverse (98334), we obtain a palindrome (54945).

The spelling of 43389 in words is "forty-three thousand, three hundred eighty-nine".