The number 43409
43409 is a composite number with 4 divisors. Its prime factorisation is 83 × 523. Divisors (4): 1, 83, 523, 43409.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43409: a semiprime: 83 × 523, the product of two primes.
- 2
43409 is composite. Its prime factorisation is
- 3
The divisors add up to 44016; without 43409 itself that is 607, so 43409 is deficient (607 is less than 43409). Euler's totient φ(43409) = 42804 numbers up to 43409 share no factor with it.
- 4
The digits of 43409 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 119 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43409 = 83 \times 523 \]
43409 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 44016 |
| Euler totient φ(n) | 42804 |
| Square | 1884341281 |
| Cube | 81797370666929 |
| Square root | 208.348266 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 119 |
| Scientific notation | 4.3409 × |
43409 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand four hundred and nine |
| Binary (base 2) | 1010100110010001 |
| Octal (base 8) | 124621 |
| Hexadecimal (base 16) | A991 |
| Base 3 | 2012112202 |
| As time | 43409 seconds = 12 h 3 min 29 s |
Is 43409 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 2) | 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 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 3) | 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 43409 a prime number?
No. 43409 = 83 × 523, so it is divisible by 83.
What are the factors of 43409?
1, 83, 523, 43409.
What is 43409 in binary?
1010100110010001 (hexadecimal A991, octal 124621).
What is the square root of 43409?
About 208.3483.
Is 43409 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 43409?
43409 is a semiprime: 83 × 523, the product of two primes.