8549 has 4 divisors (see below), whose sum is σ = 8736. Its totient is φ = 8364.

The previous prime is 8543. The next prime is 8563. The reversal of 8549 is 9458.

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 not a de Polignac number, because 8549 - 2⁸ = 8293 is a prime.

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.

It is not an unprimeable number, because it can be changed into a prime (8543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 134.

It is an arithmetic number, because the mean of its divisors is an integer number (2184).

2⁸⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

8549 is a deficient number, since it is larger than the sum of its proper divisors (187).

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 product of its digits is 1440, while the sum is 26.

The square root of 8549 is about 92.4608025057. The cubic root of 8549 is about 20.4474162959.

Subtracting 8549 from its reverse (9458), we obtain a palindrome (909).

The spelling of 8549 in words is "eight thousand, five hundred forty-nine".