The number 16423
16423 is a composite number with 4 divisors. Its prime factorisation is 11 × 1493. Divisors (4): 1, 11, 1493, 16423.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16423: a semiprime: 11 × 1493, the product of two primes.
- 2
16423 is composite. Its prime factorisation is
- 3
The divisors add up to 17928; without 16423 itself that is 1505, so 16423 is deficient (1505 is less than 16423). Euler's totient φ(16423) = 14920 numbers up to 16423 share no factor with it.
- 4
The digits of 16423 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 159 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16423 = 11 \times 1493 \]
16423 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 17928 |
| Euler totient φ(n) | 14920 |
| Square | 269714929 |
| Cube | 4429528278967 |
| Square root | 128.152253 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 159 |
| Scientific notation | 1.6423 × |
16423 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand four hundred and twenty-three |
| Binary (base 2) | 100000000100111 |
| Octal (base 8) | 40047 |
| Hexadecimal (base 16) | 4027 |
| Base 3 | 211112021 |
| As time | 16423 seconds = 4 h 33 min 43 s |
Is 16423 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 1) | 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 7) | 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 | Yes (16423 ÷ 11 = 1493) | 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 16423 a prime number?
No. 16423 = 11 × 1493, so it is divisible by 11.
What are the factors of 16423?
1, 11, 1493, 16423.
What is 16423 in binary?
100000000100111 (hexadecimal 4027, octal 40047).
What is the square root of 16423?
About 128.1523.
Is 16423 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 16423?
16423 is a semiprime: 11 × 1493, the product of two primes.