The number 8489
8489 is a composite number with 4 divisors. Its prime factorisation is 13 × 653. Divisors (4): 1, 13, 653, 8489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 8489: a semiprime: 13 × 653, the product of two primes.
- 2
8489 is composite. Its prime factorisation is
- 3
The divisors add up to 9156; without 8489 itself that is 667, so 8489 is deficient (667 is less than 8489). Euler's totient φ(8489) = 7824 numbers up to 8489 share no factor with it.
- 4
The digits of 8489 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 65 steps to reach 1.
LaTeX source of the formulas on this page
\[ 8489 = 13 \times 653 \]
8489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 9156 |
| Euler totient φ(n) | 7824 |
| Square | 72063121 |
| Cube | 611743834169 |
| Square root | 92.135769 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 65 |
| Scientific notation | 8.489 × |
8489 in other forms
| Form | Value |
|---|---|
| In words | eight thousand four hundred and eighty-nine |
| Binary (base 2) | 10000100101001 |
| Octal (base 8) | 20451 |
| Hexadecimal (base 16) | 2129 |
| Base 3 | 102122102 |
| As time | 8489 seconds = 2 h 21 min 29 s |
Is 8489 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 2) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 8489 a prime number?
No. 8489 = 13 × 653, so it is divisible by 13.
What are the factors of 8489?
1, 13, 653, 8489.
What is 8489 in binary?
10000100101001 (hexadecimal 2129, octal 20451).
What is the square root of 8489?
About 92.1358.
Is 8489 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 8489?
8489 is a semiprime: 13 × 653, the product of two primes.