The number 29689
29689 is a composite number with 4 divisors. Its prime factorisation is 11 × 2699. Divisors (4): 1, 11, 2699, 29689.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 29689: a semiprime: 11 × 2699, the product of two primes.
- 2
29689 is composite. Its prime factorisation is
- 3
The divisors add up to 32400; without 29689 itself that is 2711, so 29689 is deficient (2711 is less than 29689). Euler's totient φ(29689) = 26980 numbers up to 29689 share no factor with it.
- 4
The digits of 29689 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 72 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29689 = 11 \times 2699 \]
29689 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 32400 |
| Euler totient φ(n) | 26980 |
| Square | 881436721 |
| Cube | 26168974809769 |
| Square root | 172.304962 |
| Digit sum / digital root | 34 / 7 |
| Collatz steps to 1 | 72 |
| Scientific notation | 2.9689 × |
29689 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand six hundred and eighty-nine |
| Binary (base 2) | 111001111111001 |
| Octal (base 8) | 71771 |
| Hexadecimal (base 16) | 73F9 |
| Base 3 | 1111201121 |
| As time | 29689 seconds = 8 h 14 min 49 s |
Is 29689 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 2) | 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 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 | Yes (29689 ÷ 11 = 2699) | 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 29689 a prime number?
No. 29689 = 11 × 2699, so it is divisible by 11.
What are the factors of 29689?
1, 11, 2699, 29689.
What is 29689 in binary?
111001111111001 (hexadecimal 73F9, octal 71771).
What is the square root of 29689?
About 172.3050.
Is 29689 divisible by 3?
No. Its digits add up to 34, which is not a multiple of 3.
What is special about the number 29689?
29689 is a semiprime: 11 × 2699, the product of two primes.