Subtracting from 849 its sum of digits (21), we obtain a palindrome (828).
Subtracting from 849 its product of digits (288), we obtain a triangular number (561 = T33).
Subtracting 849 from its reverse (948), we obtain a palindrome (99).
849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an Ulam number.
It is a d-powerful number, because it can be written as 83 + 44 + 92 .
It is a D-number.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 5 and base 14.
It is an amenable number.
849 is a wasteful number, since it uses less digits than its factorization.
849 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 286.
The square root of 849 is about 29.1376045687. The cubic root of 849 is about 9.4689661367.
The spelling of 849 in words is "eight hundred forty-nine", and thus it is an aban number.