The number 889
889 is a composite number with 4 divisors. Its prime factorisation is 7 × 127. Divisors (4): 1, 7, 127, 889.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 889: a semiprime: 7 × 127, the product of two primes.
- 2
889 is composite. Its prime factorisation is
- 3
The divisors add up to 1024; without 889 itself that is 135, so 889 is deficient (135 is less than 889). Euler's totient φ(889) = 756 numbers up to 889 share no factor with it.
- 4
The digits of 889 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 147 steps to reach 1.
LaTeX source of the formulas on this page
\[ 889 = 7 \times 127 \]
889 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 1024 |
| Euler totient φ(n) | 756 |
| Square | 790321 |
| Cube | 702595369 |
| Square root | 29.816103 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 147 |
| Scientific notation | 8.89 × |
889 in other forms
| Form | Value |
|---|---|
| In words | eight hundred and eighty-nine |
| Roman numerals | DCCCLXXXIX |
| Binary (base 2) | 1101111001 |
| Octal (base 8) | 1571 |
| Hexadecimal (base 16) | 379 |
| Base 3 | 1012221 |
| As time | 889 seconds = 14 min 49 s |
Is 889 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 | Yes (889 ÷ 7 = 127) | 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 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 9) | 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 889 a prime number?
No. 889 = 7 × 127, so it is divisible by 7.
What are the factors of 889?
1, 7, 127, 889.
What is 889 in binary?
1101111001 (hexadecimal 379, octal 1571).
What is the square root of 889?
About 29.8161.
What is 889 in Roman numerals?
DCCCLXXXIX.
Is 889 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 889?
889 is a semiprime: 7 × 127, the product of two primes.