43289 has 4 divisors (see below), whose sum is σ = 43956. Its totient is φ = 42624.

The previous prime is 43283. The next prime is 43291. The reversal of 43289 is 98234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98234 = 2 ⋅49117.

It can be written as a sum of positive squares in 2 ways, for example, as 25600 + 17689 = 160^2 + 133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43289 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 369.

It is an arithmetic number, because the mean of its divisors is an integer number (10989).

2⁴³²⁸⁹ is an apocalyptic number.

It is an amenable number.

43289 is a deficient number, since it is larger than the sum of its proper divisors (667).

43289 is an equidigital number, since it uses as much as digits as its factorization.

43289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 1728, while the sum is 26.

The square root of 43289 is about 208.0600874747. The cubic root of 43289 is about 35.1122924021.

Subtracting 43289 from its reverse (98234), we obtain a palindrome (54945).

The spelling of 43289 in words is "forty-three thousand, two hundred eighty-nine".