The number 47687
47687 is a composite number with 4 divisors. Its prime factorisation is 43 × 1109. Divisors (4): 1, 43, 1109, 47687.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47687: a semiprime: 43 × 1109, the product of two primes.
- 2
47687 is composite. Its prime factorisation is
- 3
The divisors add up to 48840; without 47687 itself that is 1153, so 47687 is deficient (1153 is less than 47687). Euler's totient φ(47687) = 46536 numbers up to 47687 share no factor with it.
- 4
The digits of 47687 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 158 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47687 = 43 \times 1109 \]
47687 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48840 |
| Euler totient φ(n) | 46536 |
| Square | 2274049969 |
| Cube | 108442620871703 |
| Square root | 218.373533 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 158 |
| Scientific notation | 4.7687 × |
47687 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand six hundred and eighty-seven |
| Binary (base 2) | 1011101001000111 |
| Octal (base 8) | 135107 |
| Hexadecimal (base 16) | BA47 |
| Base 3 | 2102102012 |
| As time | 47687 seconds = 13 h 14 min 47 s |
Is 47687 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 | 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 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 2) | 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 47687 a prime number?
No. 47687 = 43 × 1109, so it is divisible by 43.
What are the factors of 47687?
1, 43, 1109, 47687.
What is 47687 in binary?
1011101001000111 (hexadecimal BA47, octal 135107).
What is the square root of 47687?
About 218.3735.
Is 47687 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 47687?
47687 is a semiprime: 43 × 1109, the product of two primes.