The number 11189
11189 is a composite number with 4 divisors. Its prime factorisation is 67 × 167. Divisors (4): 1, 67, 167, 11189.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 11189: a semiprime: 67 × 167, the product of two primes.
- 2
11189 is composite. Its prime factorisation is
- 3
The divisors add up to 11424; without 11189 itself that is 235, so 11189 is deficient (235 is less than 11189). Euler's totient φ(11189) = 10956 numbers up to 11189 share no factor with it.
- 4
The digits of 11189 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 68 steps to reach 1.
LaTeX source of the formulas on this page
\[ 11189 = 67 \times 167 \]
11189 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 11424 |
| Euler totient φ(n) | 10956 |
| Square | 125193721 |
| Cube | 1400792544269 |
| Square root | 105.778070 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 68 |
| Scientific notation | 1.1189 × |
11189 in other forms
| Form | Value |
|---|---|
| In words | eleven thousand one hundred and eighty-nine |
| Binary (base 2) | 10101110110101 |
| Octal (base 8) | 25665 |
| Hexadecimal (base 16) | 2BB5 |
| Base 3 | 120100102 |
| As time | 11189 seconds = 3 h 6 min 29 s |
Is 11189 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 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 2) | 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 11189 a prime number?
No. 11189 = 67 × 167, so it is divisible by 67.
What are the factors of 11189?
1, 67, 167, 11189.
What is 11189 in binary?
10101110110101 (hexadecimal 2BB5, octal 25665).
What is the square root of 11189?
About 105.7781.
Is 11189 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 11189?
11189 is a semiprime: 67 × 167, the product of two primes.