The number 80091
80091 is a composite number with 12 divisors. Its prime factorisation is × 11 × 809. Divisors (12): 1, 3, 9, 11, 33, 99, 809, 2427, 7281, 8899, 26697, 80091.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80091 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80091 is composite. Its prime factorisation is
- 3
The divisors add up to 126360; without 80091 itself that is 46269, so 80091 is deficient (46269 is less than 80091). Euler's totient φ(80091) = 48480 numbers up to 80091 share no factor with it.
- 4
The digits of 80091 add up to 18, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 169 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80091 = 3^{2} \times 11 \times 809 \]80091 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 126360 |
| Euler totient φ(n) | 48480 |
| Square | 6414568281 |
| Cube | 513749188193571 |
| Square root | 283.003534 (= 3√8899) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 169 |
| Scientific notation | 8.0091 × |
80091 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand and ninety-one |
| Binary (base 2) | 10011100011011011 |
| Octal (base 8) | 234333 |
| Hexadecimal (base 16) | 138DB |
| Base 3 | 11001212100 |
| As time | 80091 seconds = 22 h 14 min 51 s |
Is 80091 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 (80091 ÷ 3 = 26697) | 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 (80091 ÷ 9 = 8899) | 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 | Yes (80091 ÷ 11 = 7281) | 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 80091 a prime number?
No. 80091 = × 11 × 809, so it is divisible by 3.
What are the factors of 80091?
1, 3, 9, 11, 33, 99, 809, 2427, 7281, 8899, 26697, 80091.
What is 80091 in binary?
10011100011011011 (hexadecimal 138DB, octal 234333).
What is the square root of 80091?
About 283.0035, exactly 3√8899.
Is 80091 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 80091?
It is a composite number with 12 divisors.