The number 39001
39001 is a composite number with 4 divisors. Its prime factorisation is 43 × 907. Divisors (4): 1, 43, 907, 39001.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 39001: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 43 × 907, the product of two primes.
- 2
39001 is composite. Its prime factorisation is
- 3
The divisors add up to 39952; without 39001 itself that is 951, so 39001 is deficient (951 is less than 39001). Euler's totient φ(39001) = 38052 numbers up to 39001 share no factor with it.
- 4
The digits of 39001 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39001 = 43 \times 907 \]
39001 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 39952 |
| Euler totient φ(n) | 38052 |
| Square | 1521078001 |
| Cube | 59323563117001 |
| Square root | 197.486708 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 49 |
| Scientific notation | 3.9001 × |
39001 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand and one |
| Binary (base 2) | 1001100001011001 |
| Octal (base 8) | 114131 |
| Hexadecimal (base 16) | 9859 |
| Base 3 | 1222111111 |
| As time | 39001 seconds = 10 h 50 min 1 s |
Is 39001 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 1) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | 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 39001 a prime number?
No. 39001 = 43 × 907, so it is divisible by 43.
What are the factors of 39001?
1, 43, 907, 39001.
What is 39001 in binary?
1001100001011001 (hexadecimal 9859, octal 114131).
What is the square root of 39001?
About 197.4867.
Is 39001 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 39001?
39001 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 43 × 907, the product of two primes.