Subtracting 8549 from its reverse (9458), we obtain a palindrome (909).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9458 = 2 ⋅4729.
It is a cyclic number.
It is an alternating number because its digits alternate between even and odd.
It is a Canada number.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 15.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 8549.
28549 is an apocalyptic number.
It is an amenable number.
8549 is a wasteful number, since it uses less digits than its factorization.
8549 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 186.
The square root of 8549 is about 92.4608025057. The cubic root of 8549 is about 20.4474162959.
The spelling of 8549 in words is "eight thousand, five hundred forty-nine".