The number 49689
49689 is a composite number with 6 divisors. Its prime factorisation is × 5521. Divisors (6): 1, 3, 9, 5521, 16563, 49689.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
49689 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
49689 is composite. Its prime factorisation is
- 3
The divisors add up to 71786; without 49689 itself that is 22097, so 49689 is deficient (22097 is less than 49689). Euler's totient φ(49689) = 33120 numbers up to 49689 share no factor with it.
- 4
The digits of 49689 add up to 36, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 158 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49689 = 3^{2} \times 5521 \]49689 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 71786 |
| Euler totient φ(n) | 33120 |
| Square | 2468996721 |
| Cube | 122681978069769 |
| Square root | 222.910296 (= 3√5521) |
| Digit sum / digital root | 36 / 9 |
| Collatz steps to 1 | 158 |
| Scientific notation | 4.9689 × |
49689 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand six hundred and eighty-nine |
| Binary (base 2) | 1100001000011001 |
| Octal (base 8) | 141031 |
| Hexadecimal (base 16) | C219 |
| Base 3 | 2112011100 |
| As time | 49689 seconds = 13 h 48 min 9 s |
Is 49689 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 (49689 ÷ 3 = 16563) | 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 3) | 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 | Yes (49689 ÷ 9 = 5521) | 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 2) | 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 49689 a prime number?
No. 49689 = × 5521, so it is divisible by 3.
What are the factors of 49689?
1, 3, 9, 5521, 16563, 49689.
What is 49689 in binary?
1100001000011001 (hexadecimal C219, octal 141031).
What is the square root of 49689?
About 222.9103, exactly 3√5521.
Is 49689 divisible by 3?
Yes. Its digits add up to 36, a multiple of 3.
What is special about the number 49689?
It is a composite number with 6 divisors.