The number 80109
80109 is a composite number with 20 divisors. Its prime factorisation is × 23 × 43. Divisors (20): 1, 3, 9, 23, 27, 43, 69, 81, 129, 207, 387, 621, 989, 1161, 1863, 2967 … 80109.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80109 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80109 is composite. Its prime factorisation is
- 3
The divisors add up to 127776; without 80109 itself that is 47667, so 80109 is deficient (47667 is less than 80109). Euler's totient φ(80109) = 49896 numbers up to 80109 share no factor with it.
- 4
The digits of 80109 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 68 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80109 = 3^{4} \times 23 \times 43 \]80109 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 20 |
| Sum of divisors | 127776 |
| Euler totient φ(n) | 49896 |
| Square | 6417451881 |
| Cube | 514095652735029 |
| Square root | 283.035333 (= 9√989) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 68 |
| Scientific notation | 8.0109 × |
80109 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand one hundred and nine |
| Binary (base 2) | 10011100011101101 |
| Octal (base 8) | 234355 |
| Hexadecimal (base 16) | 138ED |
| Base 3 | 11001220000 |
| As time | 80109 seconds = 22 h 15 min 9 s |
Is 80109 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 (80109 ÷ 3 = 26703) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | 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 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (80109 ÷ 9 = 8901) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80109 a prime number?
No. 80109 = × 23 × 43, so it is divisible by 3.
What are the factors of 80109?
1, 3, 9, 23, 27, 43, 69, 81, 129, 207, 387, 621, 989, 1161, 1863, 2967, 3483, 8901, 26703, 80109.
What is 80109 in binary?
10011100011101101 (hexadecimal 138ED, octal 234355).
What is the square root of 80109?
About 283.0353, exactly 9√989.
Is 80109 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 80109?
It is a composite number with 20 divisors.