The number 6749
6749 is a composite number with 4 divisors. Its prime factorisation is 17 × 397. Divisors (4): 1, 17, 397, 6749.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 6749: a semiprime: 17 × 397, the product of two primes.
- 2
6749 is composite. Its prime factorisation is
- 3
The divisors add up to 7164; without 6749 itself that is 415, so 6749 is deficient (415 is less than 6749). Euler's totient φ(6749) = 6336 numbers up to 6749 share no factor with it.
- 4
The digits of 6749 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 44 steps to reach 1.
LaTeX source of the formulas on this page
\[ 6749 = 17 \times 397 \]
6749 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 7164 |
| Euler totient φ(n) | 6336 |
| Square | 45549001 |
| Cube | 307410207749 |
| Square root | 82.152298 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 44 |
| Scientific notation | 6.749 × |
6749 in other forms
| Form | Value |
|---|---|
| In words | six thousand seven hundred and forty-nine |
| Binary (base 2) | 1101001011101 |
| Octal (base 8) | 15135 |
| Hexadecimal (base 16) | 1A5D |
| Base 3 | 100020222 |
| As time | 6749 seconds = 1 h 52 min 29 s |
Is 6749 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 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 8) | 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 6) | 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 6749 a prime number?
No. 6749 = 17 × 397, so it is divisible by 17.
What are the factors of 6749?
1, 17, 397, 6749.
What is 6749 in binary?
1101001011101 (hexadecimal 1A5D, octal 15135).
What is the square root of 6749?
About 82.1523.
Is 6749 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 6749?
6749 is a semiprime: 17 × 397, the product of two primes.