The number 713
713 is a composite number with 4 divisors. Its prime factorisation is 23 × 31. Divisors (4): 1, 23, 31, 713.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 713: a semiprime: 23 × 31, the product of two primes.
- 2
713 is composite. Its prime factorisation is
- 3
The divisors add up to 768; without 713 itself that is 55, so 713 is deficient (55 is less than 713). Euler's totient φ(713) = 660 numbers up to 713 share no factor with it.
- 4
The digits of 713 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 25 steps to reach 1.
LaTeX source of the formulas on this page
\[ 713 = 23 \times 31 \]
713 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 768 |
| Euler totient φ(n) | 660 |
| Square | 508369 |
| Cube | 362467097 |
| Square root | 26.702060 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 25 |
| Scientific notation | 7.13 × |
713 in other forms
| Form | Value |
|---|---|
| In words | seven hundred and thirteen |
| Roman numerals | DCCXIII |
| Binary (base 2) | 1011001001 |
| Octal (base 8) | 1311 |
| Hexadecimal (base 16) | 2C9 |
| Base 3 | 222102 |
| As time | 713 seconds = 11 min 53 s |
Is 713 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 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 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 1) | 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 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 713 a prime number?
No. 713 = 23 × 31, so it is divisible by 23.
What are the factors of 713?
1, 23, 31, 713.
What is 713 in binary?
1011001001 (hexadecimal 2C9, octal 1311).
What is the square root of 713?
About 26.7021.
What is 713 in Roman numerals?
DCCXIII.
Is 713 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 713?
713 is a semiprime: 23 × 31, the product of two primes.