2649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a D-number.
It is a Duffinian number.
2649 is a lucky number.
It is a plaindrome in base 13.
It is a nialpdrome in base 14 and base 15.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 2649.
22649 is an apocalyptic number.
It is an amenable number.
2649 is an equidigital number, since it uses as much as digits as its factorization.
2649 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 886.
The square root of 2649 is about 51.4684369298. The cubic root of 2649 is about 13.8365341539.
Subtracting from 2649 its sum of digits (21), we obtain a triangular number (2628 = T72).
Adding to 2649 its product of digits (432), we get a triangular number (3081 = T78).
The spelling of 2649 in words is "two thousand, six hundred forty-nine".