The number 43387
43387 is a composite number with 4 divisors. Its prime factorisation is 43 × 1009. Divisors (4): 1, 43, 1009, 43387.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43387: a semiprime: 43 × 1009, the product of two primes.
- 2
43387 is composite. Its prime factorisation is
- 3
The divisors add up to 44440; without 43387 itself that is 1053, so 43387 is deficient (1053 is less than 43387). Euler's totient φ(43387) = 42336 numbers up to 43387 share no factor with it.
- 4
The digits of 43387 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 132 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43387 = 43 \times 1009 \]
43387 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 44440 |
| Euler totient φ(n) | 42336 |
| Square | 1882431769 |
| Cube | 81673067161603 |
| Square root | 208.295463 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 132 |
| Scientific notation | 4.3387 × |
43387 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand three hundred and eighty-seven |
| Binary (base 2) | 1010100101111011 |
| Octal (base 8) | 124573 |
| Hexadecimal (base 16) | A97B |
| Base 3 | 2012111221 |
| As time | 43387 seconds = 12 h 3 min 7 s |
Is 43387 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 2) | 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43387 a prime number?
No. 43387 = 43 × 1009, so it is divisible by 43.
What are the factors of 43387?
1, 43, 1009, 43387.
What is 43387 in binary?
1010100101111011 (hexadecimal A97B, octal 124573).
What is the square root of 43387?
About 208.2955.
Is 43387 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 43387?
43387 is a semiprime: 43 × 1009, the product of two primes.