The number 67291
67291 is a composite number with 4 divisors. Its prime factorisation is 7 × 9613. Divisors (4): 1, 7, 9613, 67291.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 67291: a semiprime: 7 × 9613, the product of two primes.
- 2
67291 is composite. Its prime factorisation is
- 3
The divisors add up to 76912; without 67291 itself that is 9621, so 67291 is deficient (9621 is less than 67291). Euler's totient φ(67291) = 57672 numbers up to 67291 share no factor with it.
- 4
The digits of 67291 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 205 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67291 = 7 \times 9613 \]
67291 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 76912 |
| Euler totient φ(n) | 57672 |
| Square | 4528078681 |
| Cube | 304698942523171 |
| Square root | 259.405089 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 205 |
| Scientific notation | 6.7291 × |
67291 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand two hundred and ninety-one |
| Binary (base 2) | 10000011011011011 |
| Octal (base 8) | 203333 |
| Hexadecimal (base 16) | 106DB |
| Base 3 | 10102022021 |
| As time | 67291 seconds = 18 h 41 min 31 s |
Is 67291 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | 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 | Yes (67291 ÷ 7 = 9613) | 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 3) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67291 a prime number?
No. 67291 = 7 × 9613, so it is divisible by 7.
What are the factors of 67291?
1, 7, 9613, 67291.
What is 67291 in binary?
10000011011011011 (hexadecimal 106DB, octal 203333).
What is the square root of 67291?
About 259.4051.
Is 67291 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 67291?
67291 is a semiprime: 7 × 9613, the product of two primes.