The number 77429
77429 is a composite number with 4 divisors. Its prime factorisation is 11 × 7039. Divisors (4): 1, 11, 7039, 77429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77429: a semiprime: 11 × 7039, the product of two primes.
- 2
77429 is composite. Its prime factorisation is
- 3
The divisors add up to 84480; without 77429 itself that is 7051, so 77429 is deficient (7051 is less than 77429). Euler's totient φ(77429) = 70380 numbers up to 77429 share no factor with it.
- 4
The digits of 77429 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 169 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77429 = 11 \times 7039 \]
77429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 84480 |
| Euler totient φ(n) | 70380 |
| Square | 5995250041 |
| Cube | 464206215424589 |
| Square root | 278.260669 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 169 |
| Scientific notation | 7.7429 × |
77429 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand four hundred and twenty-nine |
| Binary (base 2) | 10010111001110101 |
| Octal (base 8) | 227165 |
| Hexadecimal (base 16) | 12E75 |
| Base 3 | 10221012202 |
| As time | 77429 seconds = 21 h 30 min 29 s |
Is 77429 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 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 5) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 (77429 ÷ 11 = 7039) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 77429 a prime number?
No. 77429 = 11 × 7039, so it is divisible by 11.
What are the factors of 77429?
1, 11, 7039, 77429.
What is 77429 in binary?
10010111001110101 (hexadecimal 12E75, octal 227165).
What is the square root of 77429?
About 278.2607.
Is 77429 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 77429?
77429 is a semiprime: 11 × 7039, the product of two primes.