The number 31673
31673 is a composite number with 4 divisors. Its prime factorisation is 19 × 1667. Divisors (4): 1, 19, 1667, 31673.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31673: a semiprime: 19 × 1667, the product of two primes.
- 2
31673 is composite. Its prime factorisation is
- 3
The divisors add up to 33360; without 31673 itself that is 1687, so 31673 is deficient (1687 is less than 31673). Euler's totient φ(31673) = 29988 numbers up to 31673 share no factor with it.
- 4
The digits of 31673 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 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31673 = 19 \times 1667 \]
31673 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 33360 |
| Euler totient φ(n) | 29988 |
| Square | 1003178929 |
| Cube | 31773686218217 |
| Square root | 177.969098 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 103 |
| Scientific notation | 3.1673 × |
31673 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand six hundred and seventy-three |
| Binary (base 2) | 111101110111001 |
| Octal (base 8) | 75671 |
| Hexadecimal (base 16) | 7BB9 |
| Base 3 | 1121110002 |
| As time | 31673 seconds = 8 h 47 min 53 s |
Is 31673 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 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 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 4) | 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 31673 a prime number?
No. 31673 = 19 × 1667, so it is divisible by 19.
What are the factors of 31673?
1, 19, 1667, 31673.
What is 31673 in binary?
111101110111001 (hexadecimal 7BB9, octal 75671).
What is the square root of 31673?
About 177.9691.
Is 31673 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 31673?
31673 is a semiprime: 19 × 1667, the product of two primes.