The number 39949
39949 is a composite number with 8 divisors. Its prime factorisation is 7 × 13 × 439. Divisors (8): 1, 7, 13, 91, 439, 3073, 5707, 39949.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
39949 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
39949 is composite. Its prime factorisation is
- 3
The divisors add up to 49280; without 39949 itself that is 9331, so 39949 is deficient (9331 is less than 39949). Euler's totient φ(39949) = 31536 numbers up to 39949 share no factor with it.
- 4
The digits of 39949 add up to 34, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39949 = 7 \times 13 \times 439 \]
39949 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49280 |
| Euler totient φ(n) | 31536 |
| Square | 1595922601 |
| Cube | 63755511987349 |
| Square root | 199.872459 |
| Digit sum / digital root | 34 / 7 |
| Collatz steps to 1 | 168 |
| Scientific notation | 3.9949 × |
39949 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand nine hundred and forty-nine |
| Binary (base 2) | 1001110000001101 |
| Octal (base 8) | 116015 |
| Hexadecimal (base 16) | 9C0D |
| Base 3 | 2000210121 |
| As time | 39949 seconds = 11 h 5 min 49 s |
Is 39949 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 | Yes (39949 ÷ 7 = 5707) | 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 39949 a prime number?
No. 39949 = 7 × 13 × 439, so it is divisible by 7.
What are the factors of 39949?
1, 7, 13, 91, 439, 3073, 5707, 39949.
What is 39949 in binary?
1001110000001101 (hexadecimal 9C0D, octal 116015).
What is the square root of 39949?
About 199.8725.
Is 39949 divisible by 3?
No. Its digits add up to 34, which is not a multiple of 3.
What is special about the number 39949?
It is a composite number with 8 divisors.