The number 183
183 is a composite number with 4 divisors. Its prime factorisation is 3 × 61. Divisors (4): 1, 3, 61, 183.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 183: a semiprime: 3 × 61, the product of two primes.
- 2
183 is composite. Its prime factorisation is
- 3
The divisors add up to 248; without 183 itself that is 65, so 183 is deficient (65 is less than 183). Euler's totient φ(183) = 120 numbers up to 183 share no factor with it.
- 4
The digits of 183 add up to 12, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 93 steps to reach 1.
LaTeX source of the formulas on this page
\[ 183 = 3 \times 61 \]
183 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 248 |
| Euler totient φ(n) | 120 |
| Square | 33489 |
| Cube | 6128487 |
| Square root | 13.527749 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 93 |
| Scientific notation | 1.83 × |
183 in other forms
| Form | Value |
|---|---|
| In words | one hundred and eighty-three |
| Roman numerals | CLXXXIII |
| Binary (base 2) | 10110111 |
| Octal (base 8) | 267 |
| Hexadecimal (base 16) | B7 |
| Base 3 | 20210 |
| As time | 183 seconds = 3 min 3 s |
Is 183 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 (183 ÷ 3 = 61) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 3) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 183 a prime number?
No. 183 = 3 × 61, so it is divisible by 3.
What are the factors of 183?
1, 3, 61, 183.
What is 183 in binary?
10110111 (hexadecimal B7, octal 267).
What is the square root of 183?
About 13.5277.
What is 183 in Roman numerals?
CLXXXIII.
Is 183 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 183?
183 is a semiprime: 3 × 61, the product of two primes.