The number 299
299 is a composite number with 4 divisors. Its prime factorisation is 13 × 23. Divisors (4): 1, 13, 23, 299.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 299: a semiprime: 13 × 23, the product of two primes.
- 2
299 is composite. Its prime factorisation is
- 3
The divisors add up to 336; without 299 itself that is 37, so 299 is deficient (37 is less than 299). Euler's totient φ(299) = 264 numbers up to 299 share no factor with it.
- 4
The digits of 299 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 117 steps to reach 1.
LaTeX source of the formulas on this page
\[ 299 = 13 \times 23 \]
299 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 336 |
| Euler totient φ(n) | 264 |
| Square | 89401 |
| Cube | 26730899 |
| Square root | 17.291616 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 117 |
| Scientific notation | 2.99 × |
299 in other forms
| Form | Value |
|---|---|
| In words | two hundred and ninety-nine |
| Roman numerals | CCXCIX |
| Binary (base 2) | 100101011 |
| Octal (base 8) | 453 |
| Hexadecimal (base 16) | 12B |
| Base 3 | 102002 |
| As time | 299 seconds = 4 min 59 s |
Is 299 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 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 2) | 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 299 a prime number?
No. 299 = 13 × 23, so it is divisible by 13.
What are the factors of 299?
1, 13, 23, 299.
What is 299 in binary?
100101011 (hexadecimal 12B, octal 453).
What is the square root of 299?
About 17.2916.
What is 299 in Roman numerals?
CCXCIX.
Is 299 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 299?
299 is a semiprime: 13 × 23, the product of two primes.