6489 has 12 divisors (see below), whose sum is σ = 10816. Its totient is φ = 3672.

The previous prime is 6481. The next prime is 6491. The reversal of 6489 is 9846.

6489 = T₇ + T₈ + ... + T₃₃.

6489 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 6489 - 2³ = 6481 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 (6481) 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 11 ways as a sum of consecutive naturals, for example, 12 + ... + 114.

2⁶⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

6489 is a deficient number, since it is larger than the sum of its proper divisors (4327).

6489 is a wasteful number, since it uses less digits than its factorization.

6489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 113 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 6489 is about 80.5543294926. The cubic root of 6489 is about 18.6520222443.

Subtracting from 6489 its product of digits (1728), we obtain a square (4761 = 69²).

It can be divided in two parts, 648 and 9, that multiplied together give a cube (5832 = 18³).

The spelling of 6489 in words is "six thousand, four hundred eighty-nine".