The number 1489
1489 is a twin prime (1487 and 1489 are both prime) and the 237th prime number. Its only divisors are 1 and 1489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 1489: a twin prime (1487 and 1489 are both prime); the 237th prime number.
- 2
1489 is prime, so its only factors are 1 and 1489. It is the 237th prime; the next prime is 1493 and the one before is 1487.
- 3
The divisors add up to 1490; without 1489 itself that is 1, so 1489 is deficient (1 is less than 1489). Euler's totient φ(1489) = 1488 numbers up to 1489 share no factor with it.
- 4
The digits of 1489 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 47 steps to reach 1.
1489 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 1490 |
| Euler totient φ(n) | 1488 |
| Square | 2217121 |
| Cube | 3301293169 |
| Square root | 38.587563 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 47 |
| Scientific notation | 1.489 × |
1489 in other forms
| Form | Value |
|---|---|
| In words | one thousand four hundred and eighty-nine |
| Roman numerals | MCDLXXXIX |
| Binary (base 2) | 10111010001 |
| Octal (base 8) | 2721 |
| Hexadecimal (base 16) | 5D1 |
| Base 3 | 2001011 |
| As time | 1489 seconds = 24 min 49 s |
Is 1489 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 4) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 1489 a prime number?
Yes. 1489 is divisible only by 1 and itself.
What are the factors of 1489?
1, 1489.
What is 1489 in binary?
10111010001 (hexadecimal 5D1, octal 2721).
What is the square root of 1489?
About 38.5876.
What is 1489 in Roman numerals?
MCDLXXXIX.
Is 1489 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 1489?
1489 is a twin prime (1487 and 1489 are both prime); the 237th prime number.