43789 has 2 divisors, whose sum is σ = 43790. Its totient is φ = 43788.

The previous prime is 43787. The next prime is 43793. The reversal of 43789 is 98734.

It is a happy number.

43789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42025 + 1764 = 205^2 + 42^2 .

It is a cyclic number.

It is not a de Polignac number, because 43789 - 2¹ = 43787 is a prime.

Together with 43787, it forms a pair of twin primes.

43789 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 43789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21894 + 21895.

It is an arithmetic number, because the mean of its divisors is an integer number (21895).

2⁴³⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

43789 is a deficient number, since it is larger than the sum of its proper divisors (1).

43789 is an equidigital number, since it uses as much as digits as its factorization.

43789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 43789 is about 209.2582136978. The cubic root of 43789 is about 35.2469608231.

Subtracting 43789 from its reverse (98734), we obtain a palindrome (54945).

The spelling of 43789 in words is "forty-three thousand, seven hundred eighty-nine".