The number 23429
23429 is a composite number with 4 divisors. Its prime factorisation is 7 × 3347. Divisors (4): 1, 7, 3347, 23429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 23429: a semiprime: 7 × 3347, the product of two primes.
- 2
23429 is composite. Its prime factorisation is
- 3
The divisors add up to 26784; without 23429 itself that is 3355, so 23429 is deficient (3355 is less than 23429). Euler's totient φ(23429) = 20076 numbers up to 23429 share no factor with it.
- 4
The digits of 23429 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 144 steps to reach 1.
LaTeX source of the formulas on this page
\[ 23429 = 7 \times 3347 \]
23429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 26784 |
| Euler totient φ(n) | 20076 |
| Square | 548918041 |
| Cube | 12860600782589 |
| Square root | 153.065346 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 144 |
| Scientific notation | 2.3429 × |
23429 in other forms
| Form | Value |
|---|---|
| In words | twenty-three thousand four hundred and twenty-nine |
| Binary (base 2) | 101101110000101 |
| Octal (base 8) | 55605 |
| Hexadecimal (base 16) | 5B85 |
| Base 3 | 1012010202 |
| As time | 23429 seconds = 6 h 30 min 29 s |
Is 23429 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 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (23429 ÷ 7 = 3347) | 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 2) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 23429 a prime number?
No. 23429 = 7 × 3347, so it is divisible by 7.
What are the factors of 23429?
1, 7, 3347, 23429.
What is 23429 in binary?
101101110000101 (hexadecimal 5B85, octal 55605).
What is the square root of 23429?
About 153.0653.
Is 23429 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 23429?
23429 is a semiprime: 7 × 3347, the product of two primes.