The number 39009
39009 is a composite number with 4 divisors. Its prime factorisation is 3 × 13003. Divisors (4): 1, 3, 13003, 39009.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 39009: a semiprime: 3 × 13003, the product of two primes.
- 2
39009 is composite. Its prime factorisation is
- 3
The divisors add up to 52016; without 39009 itself that is 13007, so 39009 is deficient (13007 is less than 39009). Euler's totient φ(39009) = 26004 numbers up to 39009 share no factor with it.
- 4
The digits of 39009 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 274 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39009 = 3 \times 13003 \]
39009 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 52016 |
| Euler totient φ(n) | 26004 |
| Square | 1521702081 |
| Cube | 59360076477729 |
| Square root | 197.506962 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 274 |
| Scientific notation | 3.9009 × |
39009 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand and nine |
| Binary (base 2) | 1001100001100001 |
| Octal (base 8) | 114141 |
| Hexadecimal (base 16) | 9861 |
| Base 3 | 1222111210 |
| As time | 39009 seconds = 10 h 50 min 9 s |
Is 39009 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 | Yes (39009 ÷ 3 = 13003) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | 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 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 39009 a prime number?
No. 39009 = 3 × 13003, so it is divisible by 3.
What are the factors of 39009?
1, 3, 13003, 39009.
What is 39009 in binary?
1001100001100001 (hexadecimal 9861, octal 114141).
What is the square root of 39009?
About 197.5070.
Is 39009 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 39009?
39009 is a semiprime: 3 × 13003, the product of two primes.