The number 55689
55689 is a composite number with 8 divisors. Its prime factorisation is 3 × 19 × 977. Divisors (8): 1, 3, 19, 57, 977, 2931, 18563, 55689.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55689 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55689 is composite. Its prime factorisation is
- 3
The divisors add up to 78240; without 55689 itself that is 22551, so 55689 is deficient (22551 is less than 55689). Euler's totient φ(55689) = 35136 numbers up to 55689 share no factor with it.
- 4
The digits of 55689 add up to 33, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55689 = 3 \times 19 \times 977 \]
55689 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 78240 |
| Euler totient φ(n) | 35136 |
| Square | 3101264721 |
| Cube | 172706331047769 |
| Square root | 235.985169 |
| Digit sum / digital root | 33 / 6 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5689 × |
55689 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand six hundred and eighty-nine |
| Binary (base 2) | 1101100110001001 |
| Octal (base 8) | 154611 |
| Hexadecimal (base 16) | D989 |
| Base 3 | 2211101120 |
| As time | 55689 seconds = 15 h 28 min 9 s |
Is 55689 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 (55689 ÷ 3 = 18563) | 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 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 55689 a prime number?
No. 55689 = 3 × 19 × 977, so it is divisible by 3.
What are the factors of 55689?
1, 3, 19, 57, 977, 2931, 18563, 55689.
What is 55689 in binary?
1101100110001001 (hexadecimal D989, octal 154611).
What is the square root of 55689?
About 235.9852.
Is 55689 divisible by 3?
Yes. Its digits add up to 33, a multiple of 3.
What is special about the number 55689?
It is a composite number with 8 divisors.