The number 2489
2489 is a composite number with 4 divisors. Its prime factorisation is 19 × 131. Divisors (4): 1, 19, 131, 2489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 2489: a semiprime: 19 × 131, the product of two primes.
- 2
2489 is composite. Its prime factorisation is
- 3
The divisors add up to 2640; without 2489 itself that is 151, so 2489 is deficient (151 is less than 2489). Euler's totient φ(2489) = 2340 numbers up to 2489 share no factor with it.
- 4
The digits of 2489 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 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 2489 = 19 \times 131 \]
2489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 2640 |
| Euler totient φ(n) | 2340 |
| Square | 6195121 |
| Cube | 15419656169 |
| Square root | 49.889879 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 40 |
| Scientific notation | 2.489 × |
2489 in other forms
| Form | Value |
|---|---|
| In words | two thousand four hundred and eighty-nine |
| Roman numerals | MMCDLXXXIX |
| Binary (base 2) | 100110111001 |
| Octal (base 8) | 4671 |
| Hexadecimal (base 16) | 9B9 |
| Base 3 | 10102012 |
| As time | 2489 seconds = 41 min 29 s |
Is 2489 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 4) | 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 3) | 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 2489 a prime number?
No. 2489 = 19 × 131, so it is divisible by 19.
What are the factors of 2489?
1, 19, 131, 2489.
What is 2489 in binary?
100110111001 (hexadecimal 9B9, octal 4671).
What is the square root of 2489?
About 49.8899.
What is 2489 in Roman numerals?
MMCDLXXXIX.
Is 2489 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 2489?
2489 is a semiprime: 19 × 131, the product of two primes.