The number 61739
61739 is a composite number with 4 divisors. Its prime factorisation is 107 × 577. Divisors (4): 1, 107, 577, 61739.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61739: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 107 × 577, the product of two primes.
- 2
61739 is composite. Its prime factorisation is
- 3
The divisors add up to 62424; without 61739 itself that is 685, so 61739 is deficient (685 is less than 61739). Euler's totient φ(61739) = 61056 numbers up to 61739 share no factor with it.
- 4
The digits of 61739 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 86 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61739 = 107 \times 577 \]
61739 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 62424 |
| Euler totient φ(n) | 61056 |
| Square | 3811704121 |
| Cube | 235330800726419 |
| Square root | 248.473339 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 86 |
| Scientific notation | 6.1739 × |
61739 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand seven hundred and thirty-nine |
| Binary (base 2) | 1111000100101011 |
| Octal (base 8) | 170453 |
| Hexadecimal (base 16) | F12B |
| Base 3 | 10010200122 |
| As time | 61739 seconds = 17 h 8 min 59 s |
Is 61739 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 3) | 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 6) | 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 8) | 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 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61739 a prime number?
No. 61739 = 107 × 577, so it is divisible by 107.
What are the factors of 61739?
1, 107, 577, 61739.
What is 61739 in binary?
1111000100101011 (hexadecimal F12B, octal 170453).
What is the square root of 61739?
About 248.4733.
Is 61739 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 61739?
61739 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 107 × 577, the product of two primes.