The number 67813
67813 is a composite number with 4 divisors. Its prime factorisation is 17 × 3989. Divisors (4): 1, 17, 3989, 67813.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 67813: a semiprime: 17 × 3989, the product of two primes.
- 2
67813 is composite. Its prime factorisation is
- 3
The divisors add up to 71820; without 67813 itself that is 4007, so 67813 is deficient (4007 is less than 67813). Euler's totient φ(67813) = 63808 numbers up to 67813 share no factor with it.
- 4
The digits of 67813 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 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67813 = 17 \times 3989 \]
67813 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71820 |
| Euler totient φ(n) | 63808 |
| Square | 4598602969 |
| Cube | 311845063136797 |
| Square root | 260.409293 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 60 |
| Scientific notation | 6.7813 × |
67813 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand eight hundred and thirteen |
| Binary (base 2) | 10000100011100101 |
| Octal (base 8) | 204345 |
| Hexadecimal (base 16) | 108E5 |
| Base 3 | 10110000121 |
| As time | 67813 seconds = 18 h 50 min 13 s |
Is 67813 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 3) | 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 4) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 67813 a prime number?
No. 67813 = 17 × 3989, so it is divisible by 17.
What are the factors of 67813?
1, 17, 3989, 67813.
What is 67813 in binary?
10000100011100101 (hexadecimal 108E5, octal 204345).
What is the square root of 67813?
About 260.4093.
Is 67813 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 67813?
67813 is a semiprime: 17 × 3989, the product of two primes.