6549 has 8 divisors (see below), whose sum is σ = 9120. Its totient is φ = 4176.

The previous prime is 6547. The next prime is 6551. The reversal of 6549 is 9456.

It is an interprime number because it is at equal distance from previous prime (6547) and next prime (6551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6549 - 2¹ = 6547 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a plaindrome in base 14.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82 + ... + 140.

It is an arithmetic number, because the mean of its divisors is an integer number (1140).

2⁶⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

6549 is a deficient number, since it is larger than the sum of its proper divisors (2571).

6549 is a wasteful number, since it uses less digits than its factorization.

6549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99.

The product of its digits is 1080, while the sum is 24.

The square root of 6549 is about 80.9258920247. The cubic root of 6549 is about 18.7093340878.

It can be divided in two parts, 654 and 9, that multiplied together give a triangular number (5886 = T₁₀₈).

The spelling of 6549 in words is "six thousand, five hundred forty-nine".