The number 835
835 is a composite number with 4 divisors. Its prime factorisation is 5 × 167. Divisors (4): 1, 5, 167, 835.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 835: a semiprime: 5 × 167, the product of two primes.
- 2
835 is composite. Its prime factorisation is
- 3
The divisors add up to 1008; without 835 itself that is 173, so 835 is deficient (173 is less than 835). Euler's totient φ(835) = 664 numbers up to 835 share no factor with it.
- 4
The digits of 835 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 134 steps to reach 1.
LaTeX source of the formulas on this page
\[ 835 = 5 \times 167 \]
835 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 1008 |
| Euler totient φ(n) | 664 |
| Square | 697225 |
| Cube | 582182875 |
| Square root | 28.896367 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 134 |
| Scientific notation | 8.35 × |
835 in other forms
| Form | Value |
|---|---|
| In words | eight hundred and thirty-five |
| Roman numerals | DCCCXXXV |
| Binary (base 2) | 1101000011 |
| Octal (base 8) | 1503 |
| Hexadecimal (base 16) | 343 |
| Base 3 | 1010221 |
| As time | 835 seconds = 13 min 55 s |
Is 835 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 | Yes (835 ÷ 5 = 167) | 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 2) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 835 a prime number?
No. 835 = 5 × 167, so it is divisible by 5.
What are the factors of 835?
1, 5, 167, 835.
What is 835 in binary?
1101000011 (hexadecimal 343, octal 1503).
What is the square root of 835?
About 28.8964.
What is 835 in Roman numerals?
DCCCXXXV.
Is 835 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 835?
835 is a semiprime: 5 × 167, the product of two primes.