The number 47397
47397 is a composite number with 16 divisors. Its prime factorisation is 3 × 7 × 37 × 61. Divisors (16): 1, 3, 7, 21, 37, 61, 111, 183, 259, 427, 777, 1281, 2257, 6771, 15799, 47397.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47397 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47397 is composite. Its prime factorisation is
- 3
The divisors add up to 75392; without 47397 itself that is 27995, so 47397 is deficient (27995 is less than 47397). Euler's totient φ(47397) = 25920 numbers up to 47397 share no factor with it.
- 4
The digits of 47397 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47397 = 3 \times 7 \times 37 \times 61 \]
47397 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 75392 |
| Euler totient φ(n) | 25920 |
| Square | 2246475609 |
| Cube | 106476204439773 |
| Square root | 217.708521 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.7397 × |
47397 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand three hundred and ninety-seven |
| Binary (base 2) | 1011100100100101 |
| Octal (base 8) | 134445 |
| Hexadecimal (base 16) | B925 |
| Base 3 | 2102000110 |
| As time | 47397 seconds = 13 h 9 min 57 s |
Is 47397 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 (47397 ÷ 3 = 15799) | 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 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 | Yes (47397 ÷ 7 = 6771) | 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 3) | 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 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47397 a prime number?
No. 47397 = 3 × 7 × 37 × 61, so it is divisible by 3.
What are the factors of 47397?
1, 3, 7, 21, 37, 61, 111, 183, 259, 427, 777, 1281, 2257, 6771, 15799, 47397.
What is 47397 in binary?
1011100100100101 (hexadecimal B925, octal 134445).
What is the square root of 47397?
About 217.7085.
Is 47397 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 47397?
It is a composite number with 16 divisors.