The number 95
95 is a composite number with 4 divisors. Its prime factorisation is 5 × 19. Divisors (4): 1, 5, 19, 95.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 95: a semiprime: 5 × 19, the product of two primes.
- 2
95 is composite. Its prime factorisation is
- 3
The divisors add up to 120; without 95 itself that is 25, so 95 is deficient (25 is less than 95). Euler's totient φ(95) = 72 numbers up to 95 share no factor with it.
- 4
The digits of 95 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 105 steps to reach 1.
LaTeX source of the formulas on this page
\[ 95 = 5 \times 19 \]
95 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 120 |
| Euler totient φ(n) | 72 |
| Square | 9025 |
| Cube | 857375 |
| Square root | 9.746794 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 105 |
| Scientific notation | 9.5 × |
95 in other forms
| Form | Value |
|---|---|
| In words | ninety-five |
| Roman numerals | XCV |
| Binary (base 2) | 1011111 |
| Octal (base 8) | 137 |
| Hexadecimal (base 16) | 5F |
| Base 3 | 10112 |
| As time | 95 seconds = 1 min 35 s |
Is 95 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 | Yes (95 ÷ 5 = 19) | 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 4) | 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 5) | 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 7) | 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 95 a prime number?
No. 95 = 5 × 19, so it is divisible by 5.
What are the factors of 95?
1, 5, 19, 95.
What is 95 in binary?
1011111 (hexadecimal 5F, octal 137).
What is the square root of 95?
About 9.7468.
What is 95 in Roman numerals?
XCV.
Is 95 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 95?
95 is a semiprime: 5 × 19, the product of two primes.