The number 49723
49723 is a composite number with 4 divisors. Its prime factorisation is 19 × 2617. Divisors (4): 1, 19, 2617, 49723.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 49723: a semiprime: 19 × 2617, the product of two primes.
- 2
49723 is composite. Its prime factorisation is
- 3
The divisors add up to 52360; without 49723 itself that is 2637, so 49723 is deficient (2637 is less than 49723). Euler's totient φ(49723) = 47088 numbers up to 49723 share no factor with it.
- 4
The digits of 49723 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 158 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49723 = 19 \times 2617 \]
49723 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 52360 |
| Euler totient φ(n) | 47088 |
| Square | 2472376729 |
| Cube | 122933988096067 |
| Square root | 222.986547 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 158 |
| Scientific notation | 4.9723 × |
49723 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand seven hundred and twenty-three |
| Binary (base 2) | 1100001000111011 |
| Octal (base 8) | 141073 |
| Hexadecimal (base 16) | C23B |
| Base 3 | 2112012121 |
| As time | 49723 seconds = 13 h 48 min 43 s |
Is 49723 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 3) | 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 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | 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 49723 a prime number?
No. 49723 = 19 × 2617, so it is divisible by 19.
What are the factors of 49723?
1, 19, 2617, 49723.
What is 49723 in binary?
1100001000111011 (hexadecimal C23B, octal 141073).
What is the square root of 49723?
About 222.9865.
Is 49723 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 49723?
49723 is a semiprime: 19 × 2617, the product of two primes.