The number 47489
47489 is a composite number with 6 divisors. Its prime factorisation is Ć 281. Divisors (6): 1, 13, 169, 281, 3653, 47489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47489: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
47489 is composite. Its prime factorisation is
- 3
The divisors add up to 51606; without 47489 itself that is 4117, so 47489 is deficient (4117 is less than 47489). Euler's totient Ļ(47489) = 43680 numbers up to 47489 share no factor with it.
- 4
The digits of 47489 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 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47489 = 13^{2} \times 281 \]47489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 51606 |
| Euler totient Ļ(n) | 43680 |
| Square | 2255205121 |
| Cube | 107097435991169 |
| Square root | 217.919710 (= 13ā281) |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.7489 Ć |
47489 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand four hundred and eighty-nine |
| Binary (base 2) | 1011100110000001 |
| Octal (base 8) | 134601 |
| Hexadecimal (base 16) | B981 |
| Base 3 | 2102010212 |
| As time | 47489 seconds = 13 h 11 min 29 s |
Is 47489 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 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 5) | 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 1) | 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 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47489 a prime number?
No. 47489 = Ć 281, so it is divisible by 13.
What are the factors of 47489?
1, 13, 169, 281, 3653, 47489.
What is 47489 in binary?
1011100110000001 (hexadecimal B981, octal 134601).
What is the square root of 47489?
About 217.9197, exactly 13ā281.
Is 47489 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 47489?
47489 is a happy number: repeatedly adding the squares of its digits reaches 1.