The number 49791
49791 is a composite number with 8 divisors. Its prime factorisation is 3 × 7 × 2371. Divisors (8): 1, 3, 7, 21, 2371, 7113, 16597, 49791.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
49791 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
49791 is composite. Its prime factorisation is
- 3
The divisors add up to 75904; without 49791 itself that is 26113, so 49791 is deficient (26113 is less than 49791). Euler's totient φ(49791) = 28440 numbers up to 49791 share no factor with it.
- 4
The digits of 49791 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 233 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49791 = 3 \times 7 \times 2371 \]
49791 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 75904 |
| Euler totient φ(n) | 28440 |
| Square | 2479143681 |
| Cube | 123439043020671 |
| Square root | 223.138970 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 233 |
| Scientific notation | 4.9791 × |
49791 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand seven hundred and ninety-one |
| Binary (base 2) | 1100001001111111 |
| Octal (base 8) | 141177 |
| Hexadecimal (base 16) | C27F |
| Base 3 | 2112022010 |
| As time | 49791 seconds = 13 h 49 min 51 s |
Is 49791 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 (49791 ÷ 3 = 16597) | 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 1) | 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 | Yes (49791 ÷ 7 = 7113) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 49791 a prime number?
No. 49791 = 3 × 7 × 2371, so it is divisible by 3.
What are the factors of 49791?
1, 3, 7, 21, 2371, 7113, 16597, 49791.
What is 49791 in binary?
1100001001111111 (hexadecimal C27F, octal 141177).
What is the square root of 49791?
About 223.1390.
Is 49791 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 49791?
It is a composite number with 8 divisors.