The number 47849
47849 is a composite number with 4 divisors. Its prime factorisation is 59 × 811. Divisors (4): 1, 59, 811, 47849.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47849: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 59 × 811, the product of two primes.
- 2
47849 is composite. Its prime factorisation is
- 3
The divisors add up to 48720; without 47849 itself that is 871, so 47849 is deficient (871 is less than 47849). Euler's totient φ(47849) = 46980 numbers up to 47849 share no factor with it.
- 4
The digits of 47849 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 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47849 = 59 \times 811 \]
47849 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48720 |
| Euler totient φ(n) | 46980 |
| Square | 2289526801 |
| Cube | 109551567901049 |
| Square root | 218.744143 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.7849 × |
47849 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand eight hundred and forty-nine |
| Binary (base 2) | 1011101011101001 |
| Octal (base 8) | 135351 |
| Hexadecimal (base 16) | BAE9 |
| Base 3 | 2102122012 |
| As time | 47849 seconds = 13 h 17 min 29 s |
Is 47849 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 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 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 10) | 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 47849 a prime number?
No. 47849 = 59 × 811, so it is divisible by 59.
What are the factors of 47849?
1, 59, 811, 47849.
What is 47849 in binary?
1011101011101001 (hexadecimal BAE9, octal 135351).
What is the square root of 47849?
About 218.7441.
Is 47849 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 47849?
47849 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 59 × 811, the product of two primes.