The number 80087
80087 is a composite number with 8 divisors. Its prime factorisation is 7 × 17 × 673. Divisors (8): 1, 7, 17, 119, 673, 4711, 11441, 80087.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80087 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80087 is composite. Its prime factorisation is
- 3
The divisors add up to 97056; without 80087 itself that is 16969, so 80087 is deficient (16969 is less than 80087). Euler's totient φ(80087) = 64512 numbers up to 80087 share no factor with it.
- 4
The digits of 80087 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 169 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80087 = 7 \times 17 \times 673 \]
80087 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 97056 |
| Euler totient φ(n) | 64512 |
| Square | 6413927569 |
| Cube | 513672217218503 |
| Square root | 282.996466 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 169 |
| Scientific notation | 8.0087 × |
80087 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand and eighty-seven |
| Binary (base 2) | 10011100011010111 |
| Octal (base 8) | 234327 |
| Hexadecimal (base 16) | 138D7 |
| Base 3 | 11001212012 |
| As time | 80087 seconds = 22 h 14 min 47 s |
Is 80087 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 (80087 ÷ 7 = 11441) | 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 7) | 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 80087 a prime number?
No. 80087 = 7 × 17 × 673, so it is divisible by 7.
What are the factors of 80087?
1, 7, 17, 119, 673, 4711, 11441, 80087.
What is 80087 in binary?
10011100011010111 (hexadecimal 138D7, octal 234327).
What is the square root of 80087?
About 282.9965.
Is 80087 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 80087?
It is a composite number with 8 divisors.