The number 29749
29749 is a composite number with 4 divisors. Its prime factorisation is 71 × 419. Divisors (4): 1, 71, 419, 29749.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 29749: a semiprime: 71 × 419, the product of two primes.
- 2
29749 is composite. Its prime factorisation is
- 3
The divisors add up to 30240; without 29749 itself that is 491, so 29749 is deficient (491 is less than 29749). Euler's totient φ(29749) = 29260 numbers up to 29749 share no factor with it.
- 4
The digits of 29749 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 134 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29749 = 71 \times 419 \]
29749 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 30240 |
| Euler totient φ(n) | 29260 |
| Square | 885003001 |
| Cube | 26327954276749 |
| Square root | 172.478984 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 134 |
| Scientific notation | 2.9749 × |
29749 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand seven hundred and forty-nine |
| Binary (base 2) | 111010000110101 |
| Octal (base 8) | 72065 |
| Hexadecimal (base 16) | 7435 |
| Base 3 | 1111210211 |
| As time | 29749 seconds = 8 h 15 min 49 s |
Is 29749 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 6) | 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 4) | 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 5) | 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 29749 a prime number?
No. 29749 = 71 × 419, so it is divisible by 71.
What are the factors of 29749?
1, 71, 419, 29749.
What is 29749 in binary?
111010000110101 (hexadecimal 7435, octal 72065).
What is the square root of 29749?
About 172.4790.
Is 29749 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 29749?
29749 is a semiprime: 71 × 419, the product of two primes.