The number 67491
67491 is a composite number with 6 divisors. Its prime factorisation is × 7499. Divisors (6): 1, 3, 9, 7499, 22497, 67491.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
67491 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
67491 is composite. Its prime factorisation is
- 3
The divisors add up to 97500; without 67491 itself that is 30009, so 67491 is deficient (30009 is less than 67491). Euler's totient φ(67491) = 44988 numbers up to 67491 share no factor with it.
- 4
The digits of 67491 add up to 27, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67491 = 3^{2} \times 7499 \]67491 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 97500 |
| Euler totient φ(n) | 44988 |
| Square | 4555035081 |
| Cube | 307423872651771 |
| Square root | 259.790300 (= 3√7499) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 60 |
| Scientific notation | 6.7491 × |
67491 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand four hundred and ninety-one |
| Binary (base 2) | 10000011110100011 |
| Octal (base 8) | 203643 |
| Hexadecimal (base 16) | 107A3 |
| Base 3 | 10102120200 |
| As time | 67491 seconds = 18 h 44 min 51 s |
Is 67491 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 | Yes (67491 ÷ 3 = 22497) | 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 3) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (67491 ÷ 9 = 7499) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67491 a prime number?
No. 67491 = × 7499, so it is divisible by 3.
What are the factors of 67491?
1, 3, 9, 7499, 22497, 67491.
What is 67491 in binary?
10000011110100011 (hexadecimal 107A3, octal 203643).
What is the square root of 67491?
About 259.7903, exactly 3√7499.
Is 67491 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 67491?
It is a composite number with 6 divisors.