The number 77143
77143 is a composite number with 4 divisors. Its prime factorisation is 11 × 7013. Divisors (4): 1, 11, 7013, 77143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77143: a semiprime: 11 × 7013, the product of two primes.
- 2
77143 is composite. Its prime factorisation is
- 3
The divisors add up to 84168; without 77143 itself that is 7025, so 77143 is deficient (7025 is less than 77143). Euler's totient φ(77143) = 70120 numbers up to 77143 share no factor with it.
- 4
The digits of 77143 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 169 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77143 = 11 \times 7013 \]
77143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 84168 |
| Euler totient φ(n) | 70120 |
| Square | 5951042449 |
| Cube | 459081267643207 |
| Square root | 277.746287 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 169 |
| Scientific notation | 7.7143 × |
77143 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand one hundred and forty-three |
| Binary (base 2) | 10010110101010111 |
| Octal (base 8) | 226527 |
| Hexadecimal (base 16) | 12D57 |
| Base 3 | 10220211011 |
| As time | 77143 seconds = 21 h 25 min 43 s |
Is 77143 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | 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 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 7) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (77143 ÷ 11 = 7013) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 77143 a prime number?
No. 77143 = 11 × 7013, so it is divisible by 11.
What are the factors of 77143?
1, 11, 7013, 77143.
What is 77143 in binary?
10010110101010111 (hexadecimal 12D57, octal 226527).
What is the square root of 77143?
About 277.7463.
Is 77143 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 77143?
77143 is a semiprime: 11 × 7013, the product of two primes.