The number 29139
29139 is a composite number with 8 divisors. Its prime factorisation is 3 × 11 × 883. Divisors (8): 1, 3, 11, 33, 883, 2649, 9713, 29139.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 29139: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
29139 is composite. Its prime factorisation is
- 3
The divisors add up to 42432; without 29139 itself that is 13293, so 29139 is deficient (13293 is less than 29139). Euler's totient φ(29139) = 17640 numbers up to 29139 share no factor with it.
- 4
The digits of 29139 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 59 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29139 = 3 \times 11 \times 883 \]
29139 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 42432 |
| Euler totient φ(n) | 17640 |
| Square | 849081321 |
| Cube | 24741380612619 |
| Square root | 170.701494 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 59 |
| Scientific notation | 2.9139 × |
29139 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand one hundred and thirty-nine |
| Binary (base 2) | 111000111010011 |
| Octal (base 8) | 70723 |
| Hexadecimal (base 16) | 71D3 |
| Base 3 | 1110222020 |
| As time | 29139 seconds = 8 h 5 min 39 s |
Is 29139 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 | Yes (29139 ÷ 3 = 9713) | 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 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 (29139 ÷ 11 = 2649) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 29139 a prime number?
No. 29139 = 3 × 11 × 883, so it is divisible by 3.
What are the factors of 29139?
1, 3, 11, 33, 883, 2649, 9713, 29139.
What is 29139 in binary?
111000111010011 (hexadecimal 71D3, octal 70723).
What is the square root of 29139?
About 170.7015.
Is 29139 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 29139?
29139 is a happy number: repeatedly adding the squares of its digits reaches 1.