The number 29687
29687 is a composite number with 4 divisors. Its prime factorisation is 7 × 4241. Divisors (4): 1, 7, 4241, 29687.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 29687: a semiprime: 7 × 4241, the product of two primes.
- 2
29687 is composite. Its prime factorisation is
- 3
The divisors add up to 33936; without 29687 itself that is 4249, so 29687 is deficient (4249 is less than 29687). Euler's totient φ(29687) = 25440 numbers up to 29687 share no factor with it.
- 4
The digits of 29687 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 121 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29687 = 7 \times 4241 \]
29687 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 33936 |
| Euler totient φ(n) | 25440 |
| Square | 881317969 |
| Cube | 26163686545703 |
| Square root | 172.299158 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 121 |
| Scientific notation | 2.9687 × |
29687 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand six hundred and eighty-seven |
| Binary (base 2) | 111001111110111 |
| Octal (base 8) | 71767 |
| Hexadecimal (base 16) | 73F7 |
| Base 3 | 1111201112 |
| As time | 29687 seconds = 8 h 14 min 47 s |
Is 29687 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 (29687 ÷ 7 = 4241) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 29687 a prime number?
No. 29687 = 7 × 4241, so it is divisible by 7.
What are the factors of 29687?
1, 7, 4241, 29687.
What is 29687 in binary?
111001111110111 (hexadecimal 73F7, octal 71767).
What is the square root of 29687?
About 172.2992.
Is 29687 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 29687?
29687 is a semiprime: 7 × 4241, the product of two primes.