The number 16549
16549 is a composite number with 8 divisors. Its prime factorisation is 13 × 19 × 67. Divisors (8): 1, 13, 19, 67, 247, 871, 1273, 16549.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
16549 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
16549 is composite. Its prime factorisation is
- 3
The divisors add up to 19040; without 16549 itself that is 2491, so 16549 is deficient (2491 is less than 16549). Euler's totient φ(16549) = 14256 numbers up to 16549 share no factor with it.
- 4
The digits of 16549 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 97 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16549 = 13 \times 19 \times 67 \]
16549 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 19040 |
| Euler totient φ(n) | 14256 |
| Square | 273869401 |
| Cube | 4532264717149 |
| Square root | 128.642917 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 97 |
| Scientific notation | 1.6549 × |
16549 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand five hundred and forty-nine |
| Binary (base 2) | 100000010100101 |
| Octal (base 8) | 40245 |
| Hexadecimal (base 16) | 40A5 |
| Base 3 | 211200221 |
| As time | 16549 seconds = 4 h 35 min 49 s |
Is 16549 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 16549 a prime number?
No. 16549 = 13 × 19 × 67, so it is divisible by 13.
What are the factors of 16549?
1, 13, 19, 67, 247, 871, 1273, 16549.
What is 16549 in binary?
100000010100101 (hexadecimal 40A5, octal 40245).
What is the square root of 16549?
About 128.6429.
Is 16549 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 16549?
It is a composite number with 8 divisors.