The number 87429
87429 is a composite number with 8 divisors. Its prime factorisation is 3 × 151 × 193. Divisors (8): 1, 3, 151, 193, 453, 579, 29143, 87429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
87429 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
87429 is composite. Its prime factorisation is
- 3
The divisors add up to 117952; without 87429 itself that is 30523, so 87429 is deficient (30523 is less than 87429). Euler's totient φ(87429) = 57600 numbers up to 87429 share no factor with it.
- 4
The digits of 87429 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 58 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87429 = 3 \times 151 \times 193 \]
87429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 117952 |
| Euler totient φ(n) | 57600 |
| Square | 7643830041 |
| Cube | 668292416654589 |
| Square root | 295.683953 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 58 |
| Scientific notation | 8.7429 × |
87429 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand four hundred and twenty-nine |
| Binary (base 2) | 10101010110000101 |
| Octal (base 8) | 252605 |
| Hexadecimal (base 16) | 15585 |
| Base 3 | 11102221010 |
| As time | 87429 seconds = 24 h 17 min 9 s |
Is 87429 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 (87429 ÷ 3 = 29143) | 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 3) | 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 3) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 87429 a prime number?
No. 87429 = 3 × 151 × 193, so it is divisible by 3.
What are the factors of 87429?
1, 3, 151, 193, 453, 579, 29143, 87429.
What is 87429 in binary?
10101010110000101 (hexadecimal 15585, octal 252605).
What is the square root of 87429?
About 295.6840.
Is 87429 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 87429?
It is a composite number with 8 divisors.