The number 67487
67487 is a composite number with 8 divisors. Its prime factorisation is 7 × 31 × 311. Divisors (8): 1, 7, 31, 217, 311, 2177, 9641, 67487.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
67487 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
67487 is composite. Its prime factorisation is
- 3
The divisors add up to 79872; without 67487 itself that is 12385, so 67487 is deficient (12385 is less than 67487). Euler's totient φ(67487) = 55800 numbers up to 67487 share no factor with it.
- 4
The digits of 67487 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 205 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67487 = 7 \times 31 \times 311 \]
67487 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 79872 |
| Euler totient φ(n) | 55800 |
| Square | 4554495169 |
| Cube | 307369215470303 |
| Square root | 259.782601 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 205 |
| Scientific notation | 6.7487 × |
67487 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand four hundred and eighty-seven |
| Binary (base 2) | 10000011110011111 |
| Octal (base 8) | 203637 |
| Hexadecimal (base 16) | 1079F |
| Base 3 | 10102120112 |
| As time | 67487 seconds = 18 h 44 min 47 s |
Is 67487 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 | Yes (67487 ÷ 7 = 9641) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67487 a prime number?
No. 67487 = 7 × 31 × 311, so it is divisible by 7.
What are the factors of 67487?
1, 7, 31, 217, 311, 2177, 9641, 67487.
What is 67487 in binary?
10000011110011111 (hexadecimal 1079F, octal 203637).
What is the square root of 67487?
About 259.7826.
Is 67487 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 67487?
It is a composite number with 8 divisors.