The number 4309
4309 is a composite number with 4 divisors. Its prime factorisation is 31 × 139. Divisors (4): 1, 31, 139, 4309.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 4309: a semiprime: 31 × 139, the product of two primes.
- 2
4309 is composite. Its prime factorisation is
- 3
The divisors add up to 4480; without 4309 itself that is 171, so 4309 is deficient (171 is less than 4309). Euler's totient φ(4309) = 4140 numbers up to 4309 share no factor with it.
- 4
The digits of 4309 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 33 steps to reach 1.
LaTeX source of the formulas on this page
\[ 4309 = 31 \times 139 \]
4309 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 4480 |
| Euler totient φ(n) | 4140 |
| Square | 18567481 |
| Cube | 80007275629 |
| Square root | 65.642974 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 33 |
| Scientific notation | 4.309 × |
4309 in other forms
| Form | Value |
|---|---|
| In words | four thousand three hundred and nine |
| Binary (base 2) | 1000011010101 |
| Octal (base 8) | 10325 |
| Hexadecimal (base 16) | 10D5 |
| Base 3 | 12220121 |
| As time | 4309 seconds = 1 h 11 min 49 s |
Is 4309 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 7) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 4309 a prime number?
No. 4309 = 31 × 139, so it is divisible by 31.
What are the factors of 4309?
1, 31, 139, 4309.
What is 4309 in binary?
1000011010101 (hexadecimal 10D5, octal 10325).
What is the square root of 4309?
About 65.6430.
Is 4309 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 4309?
4309 is a semiprime: 31 × 139, the product of two primes.