The number 47427
47427 is a composite number with 4 divisors. Its prime factorisation is 3 × 15809. Divisors (4): 1, 3, 15809, 47427.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47427: a semiprime: 3 × 15809, the product of two primes.
- 2
47427 is composite. Its prime factorisation is
- 3
The divisors add up to 63240; without 47427 itself that is 15813, so 47427 is deficient (15813 is less than 47427). Euler's totient φ(47427) = 31616 numbers up to 47427 share no factor with it.
- 4
The digits of 47427 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 176 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47427 = 3 \times 15809 \]
47427 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63240 |
| Euler totient φ(n) | 31616 |
| Square | 2249320329 |
| Cube | 106678515243483 |
| Square root | 217.777409 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 176 |
| Scientific notation | 4.7427 × |
47427 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand four hundred and twenty-seven |
| Binary (base 2) | 1011100101000011 |
| Octal (base 8) | 134503 |
| Hexadecimal (base 16) | B943 |
| Base 3 | 2102001120 |
| As time | 47427 seconds = 13 h 10 min 27 s |
Is 47427 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 | Yes (47427 ÷ 3 = 15809) | 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 3) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47427 a prime number?
No. 47427 = 3 × 15809, so it is divisible by 3.
What are the factors of 47427?
1, 3, 15809, 47427.
What is 47427 in binary?
1011100101000011 (hexadecimal B943, octal 134503).
What is the square root of 47427?
About 217.7774.
Is 47427 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 47427?
47427 is a semiprime: 3 × 15809, the product of two primes.