The number 90143
90143 is a composite number with 4 divisors. Its prime factorisation is 109 × 827. Divisors (4): 1, 109, 827, 90143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 90143: a semiprime: 109 × 827, the product of two primes.
- 2
90143 is composite. Its prime factorisation is
- 3
The divisors add up to 91080; without 90143 itself that is 937, so 90143 is deficient (937 is less than 90143). Euler's totient φ(90143) = 89208 numbers up to 90143 share no factor with it.
- 4
The digits of 90143 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 164 steps to reach 1.
LaTeX source of the formulas on this page
\[ 90143 = 109 \times 827 \]
90143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 91080 |
| Euler totient φ(n) | 89208 |
| Square | 8125760449 |
| Cube | 732480424154207 |
| Square root | 300.238239 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 164 |
| Scientific notation | 9.0143 × |
90143 in other forms
| Form | Value |
|---|---|
| In words | ninety thousand one hundred and forty-three |
| Binary (base 2) | 10110000000011111 |
| Octal (base 8) | 260037 |
| Hexadecimal (base 16) | 1601F |
| Base 3 | 11120122122 |
| As time | 90143 seconds = 25 h 2 min 23 s |
Is 90143 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | 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 4) | 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 7) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 90143 a prime number?
No. 90143 = 109 × 827, so it is divisible by 109.
What are the factors of 90143?
1, 109, 827, 90143.
What is 90143 in binary?
10110000000011111 (hexadecimal 1601F, octal 260037).
What is the square root of 90143?
About 300.2382.
Is 90143 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 90143?
90143 is a semiprime: 109 × 827, the product of two primes.