The number 9879
9879 is a composite number with 8 divisors. Its prime factorisation is 3 × 37 × 89. Divisors (8): 1, 3, 37, 89, 111, 267, 3293, 9879.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
9879 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
9879 is composite. Its prime factorisation is
- 3
The divisors add up to 13680; without 9879 itself that is 3801, so 9879 is deficient (3801 is less than 9879). Euler's totient φ(9879) = 6336 numbers up to 9879 share no factor with it.
- 4
The digits of 9879 add up to 33, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 135 steps to reach 1.
LaTeX source of the formulas on this page
\[ 9879 = 3 \times 37 \times 89 \]
9879 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 13680 |
| Euler totient φ(n) | 6336 |
| Square | 97594641 |
| Cube | 964137458439 |
| Square root | 99.393159 |
| Digit sum / digital root | 33 / 6 |
| Collatz steps to 1 | 135 |
| Scientific notation | 9.879 × |
9879 in other forms
| Form | Value |
|---|---|
| In words | nine thousand eight hundred and seventy-nine |
| Binary (base 2) | 10011010010111 |
| Octal (base 8) | 23227 |
| Hexadecimal (base 16) | 2697 |
| Base 3 | 111112220 |
| As time | 9879 seconds = 2 h 44 min 39 s |
Is 9879 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 (9879 ÷ 3 = 3293) | 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 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 2) | 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 6) | 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 1) | 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 9879 a prime number?
No. 9879 = 3 × 37 × 89, so it is divisible by 3.
What are the factors of 9879?
1, 3, 37, 89, 111, 267, 3293, 9879.
What is 9879 in binary?
10011010010111 (hexadecimal 2697, octal 23227).
What is the square root of 9879?
About 99.3932.
Is 9879 divisible by 3?
Yes. Its digits add up to 33, a multiple of 3.
What is special about the number 9879?
It is a composite number with 8 divisors.