The number 80023
80023 is a composite number with 4 divisors. Its prime factorisation is 43 × 1861. Divisors (4): 1, 43, 1861, 80023.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80023: a semiprime: 43 × 1861, the product of two primes.
- 2
80023 is composite. Its prime factorisation is
- 3
The divisors add up to 81928; without 80023 itself that is 1905, so 80023 is deficient (1905 is less than 80023). Euler's totient φ(80023) = 78120 numbers up to 80023 share no factor with it.
- 4
The digits of 80023 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 182 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80023 = 43 \times 1861 \]
80023 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 81928 |
| Euler totient φ(n) | 78120 |
| Square | 6403680529 |
| Cube | 512441726972167 |
| Square root | 282.883368 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 182 |
| Scientific notation | 8.0023 × |
80023 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand and twenty-three |
| Binary (base 2) | 10011100010010111 |
| Octal (base 8) | 234227 |
| Hexadecimal (base 16) | 13897 |
| Base 3 | 11001202211 |
| As time | 80023 seconds = 22 h 13 min 43 s |
Is 80023 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 1) | 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 1) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80023 a prime number?
No. 80023 = 43 × 1861, so it is divisible by 43.
What are the factors of 80023?
1, 43, 1861, 80023.
What is 80023 in binary?
10011100010010111 (hexadecimal 13897, octal 234227).
What is the square root of 80023?
About 282.8834.
Is 80023 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 80023?
80023 is a semiprime: 43 × 1861, the product of two primes.