The number 43709
43709 is a composite number with 4 divisors. Its prime factorisation is 109 × 401. Divisors (4): 1, 109, 401, 43709.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43709: a semiprime: 109 × 401, the product of two primes.
- 2
43709 is composite. Its prime factorisation is
- 3
The divisors add up to 44220; without 43709 itself that is 511, so 43709 is deficient (511 is less than 43709). Euler's totient φ(43709) = 43200 numbers up to 43709 share no factor with it.
- 4
The digits of 43709 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43709 = 109 \times 401 \]
43709 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 44220 |
| Euler totient φ(n) | 43200 |
| Square | 1910476681 |
| Cube | 83505025249829 |
| Square root | 209.066975 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.3709 × |
43709 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand seven hundred and nine |
| Binary (base 2) | 1010101010111101 |
| Octal (base 8) | 125275 |
| Hexadecimal (base 16) | AABD |
| Base 3 | 2012221212 |
| As time | 43709 seconds = 12 h 8 min 29 s |
Is 43709 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 1) | 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 5) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43709 a prime number?
No. 43709 = 109 × 401, so it is divisible by 109.
What are the factors of 43709?
1, 109, 401, 43709.
What is 43709 in binary?
1010101010111101 (hexadecimal AABD, octal 125275).
What is the square root of 43709?
About 209.0670.
Is 43709 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 43709?
43709 is a semiprime: 109 × 401, the product of two primes.