The number 61089
61089 is a composite number with 8 divisors. Its prime factorisation is 3 × 7 × 2909. Divisors (8): 1, 3, 7, 21, 2909, 8727, 20363, 61089.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61089 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61089 is composite. Its prime factorisation is
- 3
The divisors add up to 93120; without 61089 itself that is 32031, so 61089 is deficient (32031 is less than 61089). Euler's totient φ(61089) = 34896 numbers up to 61089 share no factor with it.
- 4
The digits of 61089 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 148 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61089 = 3 \times 7 \times 2909 \]
61089 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 93120 |
| Euler totient φ(n) | 34896 |
| Square | 3731865921 |
| Cube | 227975957247969 |
| Square root | 247.161890 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 148 |
| Scientific notation | 6.1089 × |
61089 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand and eighty-nine |
| Binary (base 2) | 1110111010100001 |
| Octal (base 8) | 167241 |
| Hexadecimal (base 16) | EEA1 |
| Base 3 | 10002210120 |
| As time | 61089 seconds = 16 h 58 min 9 s |
Is 61089 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 | Yes (61089 ÷ 3 = 20363) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (61089 ÷ 7 = 8727) | 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 6) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61089 a prime number?
No. 61089 = 3 × 7 × 2909, so it is divisible by 3.
What are the factors of 61089?
1, 3, 7, 21, 2909, 8727, 20363, 61089.
What is 61089 in binary?
1110111010100001 (hexadecimal EEA1, octal 167241).
What is the square root of 61089?
About 247.1619.
Is 61089 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 61089?
It is a composite number with 8 divisors.