The number 16723
16723 is a composite number with 4 divisors. Its prime factorisation is 7 × 2389. Divisors (4): 1, 7, 2389, 16723.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16723: a semiprime: 7 × 2389, the product of two primes.
- 2
16723 is composite. Its prime factorisation is
- 3
The divisors add up to 19120; without 16723 itself that is 2397, so 16723 is deficient (2397 is less than 16723). Euler's totient φ(16723) = 14328 numbers up to 16723 share no factor with it.
- 4
The digits of 16723 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 115 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16723 = 7 \times 2389 \]
16723 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 19120 |
| Euler totient φ(n) | 14328 |
| Square | 279658729 |
| Cube | 4676732925067 |
| Square root | 129.317439 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 115 |
| Scientific notation | 1.6723 × |
16723 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand seven hundred and twenty-three |
| Binary (base 2) | 100000101010011 |
| Octal (base 8) | 40523 |
| Hexadecimal (base 16) | 4153 |
| Base 3 | 211221101 |
| As time | 16723 seconds = 4 h 38 min 43 s |
Is 16723 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 | Yes (16723 ÷ 7 = 2389) | 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 1) | 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 16723 a prime number?
No. 16723 = 7 × 2389, so it is divisible by 7.
What are the factors of 16723?
1, 7, 2389, 16723.
What is 16723 in binary?
100000101010011 (hexadecimal 4153, octal 40523).
What is the square root of 16723?
About 129.3174.
Is 16723 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 16723?
16723 is a semiprime: 7 × 2389, the product of two primes.