The number 9439
9439 is a twin prime (9437 and 9439 are both prime) and the 1170th prime number. Its only divisors are 1 and 9439.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 9439: a twin prime (9437 and 9439 are both prime); the 1170th prime number.
- 2
9439 is prime, so its only factors are 1 and 9439. It is the 1170th prime; the next prime is 9461 and the one before is 9437.
- 3
The divisors add up to 9440; without 9439 itself that is 1, so 9439 is deficient (1 is less than 9439). Euler's totient φ(9439) = 9438 numbers up to 9439 share no factor with it.
- 4
The digits of 9439 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 104 steps to reach 1.
9439 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 9440 |
| Euler totient φ(n) | 9438 |
| Square | 89094721 |
| Cube | 840965071519 |
| Square root | 97.154516 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 104 |
| Scientific notation | 9.439 × |
9439 in other forms
| Form | Value |
|---|---|
| In words | nine thousand four hundred and thirty-nine |
| Binary (base 2) | 10010011011111 |
| Octal (base 8) | 22337 |
| Hexadecimal (base 16) | 24DF |
| Base 3 | 110221121 |
| As time | 9439 seconds = 2 h 37 min 19 s |
Is 9439 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 1) | 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 1) | 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 7) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 9439 a prime number?
Yes. 9439 is divisible only by 1 and itself.
What are the factors of 9439?
1, 9439.
What is 9439 in binary?
10010011011111 (hexadecimal 24DF, octal 22337).
What is the square root of 9439?
About 97.1545.
Is 9439 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 9439?
9439 is a twin prime (9437 and 9439 are both prime); the 1170th prime number.