The number 77089
77089 is a composite number with 4 divisors. Its prime factorisation is 127 × 607. Divisors (4): 1, 127, 607, 77089.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77089: a semiprime: 127 × 607, the product of two primes.
- 2
77089 is composite. Its prime factorisation is
- 3
The divisors add up to 77824; without 77089 itself that is 735, so 77089 is deficient (735 is less than 77089). Euler's totient φ(77089) = 76356 numbers up to 77089 share no factor with it.
- 4
The digits of 77089 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 138 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77089 = 127 \times 607 \]
77089 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 77824 |
| Euler totient φ(n) | 76356 |
| Square | 5942713921 |
| Cube | 458117873455969 |
| Square root | 277.649059 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 138 |
| Scientific notation | 7.7089 × |
77089 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand and eighty-nine |
| Binary (base 2) | 10010110100100001 |
| Octal (base 8) | 226441 |
| Hexadecimal (base 16) | 12D21 |
| Base 3 | 10220202011 |
| As time | 77089 seconds = 21 h 24 min 49 s |
Is 77089 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 1) | 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 77089 a prime number?
No. 77089 = 127 × 607, so it is divisible by 127.
What are the factors of 77089?
1, 127, 607, 77089.
What is 77089 in binary?
10010110100100001 (hexadecimal 12D21, octal 226441).
What is the square root of 77089?
About 277.6491.
Is 77089 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 77089?
77089 is a semiprime: 127 × 607, the product of two primes.