The number 53709
53709 is a composite number with 4 divisors. Its prime factorisation is 3 × 17903. Divisors (4): 1, 3, 17903, 53709.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 53709: a semiprime: 3 × 17903, the product of two primes.
- 2
53709 is composite. Its prime factorisation is
- 3
The divisors add up to 71616; without 53709 itself that is 17907, so 53709 is deficient (17907 is less than 53709). Euler's totient φ(53709) = 35804 numbers up to 53709 share no factor with it.
- 4
The digits of 53709 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 140 steps to reach 1.
LaTeX source of the formulas on this page
\[ 53709 = 3 \times 17903 \]
53709 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71616 |
| Euler totient φ(n) | 35804 |
| Square | 2884656681 |
| Cube | 154932025679829 |
| Square root | 231.752023 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 140 |
| Scientific notation | 5.3709 × |
53709 in other forms
| Form | Value |
|---|---|
| In words | fifty-three thousand seven hundred and nine |
| Binary (base 2) | 1101000111001101 |
| Octal (base 8) | 150715 |
| Hexadecimal (base 16) | D1CD |
| Base 3 | 2201200020 |
| As time | 53709 seconds = 14 h 55 min 9 s |
Is 53709 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 (53709 ÷ 3 = 17903) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 6) | 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 7) | 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 53709 a prime number?
No. 53709 = 3 × 17903, so it is divisible by 3.
What are the factors of 53709?
1, 3, 17903, 53709.
What is 53709 in binary?
1101000111001101 (hexadecimal D1CD, octal 150715).
What is the square root of 53709?
About 231.7520.
Is 53709 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 53709?
53709 is a semiprime: 3 × 17903, the product of two primes.