It is a happy number.
6789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
6789 is a lucky number.
It is a straight-line number, since its digits are in arithmetic progression.
It is a plaindrome in base 10 and base 14.
It is a congruent number.
It is an amenable number.
6789 is a wasteful number, since it uses less digits than its factorization.
6789 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 107.
The square root of 6789 is about 82.3953882205. The cubic root of 6789 is about 18.9351435925.
The spelling of 6789 in words is "six thousand, seven hundred eighty-nine".