The number 11489
11489 is a twin prime (11489 and 11491 are both prime) and the 1385th prime number. Its only divisors are 1 and 11489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 11489: a twin prime (11489 and 11491 are both prime); the 1385th prime number.
- 2
11489 is prime, so its only factors are 1 and 11489. It is the 1385th prime; the next prime is 11491 and the one before is 11483.
- 3
The divisors add up to 11490; without 11489 itself that is 1, so 11489 is deficient (1 is less than 11489). Euler's totient φ(11489) = 11488 numbers up to 11489 share no factor with it.
- 4
The digits of 11489 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 174 steps to reach 1.
11489 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 11490 |
| Euler totient φ(n) | 11488 |
| Square | 131997121 |
| Cube | 1516514923169 |
| Square root | 107.186753 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 174 |
| Scientific notation | 1.1489 × |
11489 in other forms
| Form | Value |
|---|---|
| In words | eleven thousand four hundred and eighty-nine |
| Binary (base 2) | 10110011100001 |
| Octal (base 8) | 26341 |
| Hexadecimal (base 16) | 2CE1 |
| Base 3 | 120202112 |
| As time | 11489 seconds = 3 h 11 min 29 s |
Is 11489 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 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 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 5) | 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 11489 a prime number?
Yes. 11489 is divisible only by 1 and itself.
What are the factors of 11489?
1, 11489.
What is 11489 in binary?
10110011100001 (hexadecimal 2CE1, octal 26341).
What is the square root of 11489?
About 107.1868.
Is 11489 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 11489?
11489 is a twin prime (11489 and 11491 are both prime); the 1385th prime number.