The number 87029
87029 is a composite number with 4 divisors. Its prime factorisation is 29 × 3001. Divisors (4): 1, 29, 3001, 87029.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 87029: a semiprime: 29 × 3001, the product of two primes.
- 2
87029 is composite. Its prime factorisation is
- 3
The divisors add up to 90060; without 87029 itself that is 3031, so 87029 is deficient (3031 is less than 87029). Euler's totient φ(87029) = 84000 numbers up to 87029 share no factor with it.
- 4
The digits of 87029 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 71 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87029 = 29 \times 3001 \]
87029 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 90060 |
| Euler totient φ(n) | 84000 |
| Square | 7574046841 |
| Cube | 659161722525389 |
| Square root | 295.006780 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 71 |
| Scientific notation | 8.7029 × |
87029 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand and twenty-nine |
| Binary (base 2) | 10101001111110101 |
| Octal (base 8) | 251765 |
| Hexadecimal (base 16) | 153F5 |
| Base 3 | 11102101022 |
| As time | 87029 seconds = 24 h 10 min 29 s |
Is 87029 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 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | 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 8) | 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 87029 a prime number?
No. 87029 = 29 × 3001, so it is divisible by 29.
What are the factors of 87029?
1, 29, 3001, 87029.
What is 87029 in binary?
10101001111110101 (hexadecimal 153F5, octal 251765).
What is the square root of 87029?
About 295.0068.
Is 87029 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 87029?
87029 is a semiprime: 29 × 3001, the product of two primes.