The number 74473
74473 is a composite number with 4 divisors. Its prime factorisation is 7 × 10639. Divisors (4): 1, 7, 10639, 74473.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 74473: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 10639, the product of two primes.
- 2
74473 is composite. Its prime factorisation is
- 3
The divisors add up to 85120; without 74473 itself that is 10647, so 74473 is deficient (10647 is less than 74473). Euler's totient φ(74473) = 63828 numbers up to 74473 share no factor with it.
- 4
The digits of 74473 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 187 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74473 = 7 \times 10639 \]
74473 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 85120 |
| Euler totient φ(n) | 63828 |
| Square | 5546227729 |
| Cube | 413044217661817 |
| Square root | 272.897417 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 187 |
| Scientific notation | 7.4473 × |
74473 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand four hundred and seventy-three |
| Binary (base 2) | 10010001011101001 |
| Octal (base 8) | 221351 |
| Hexadecimal (base 16) | 122E9 |
| Base 3 | 10210011021 |
| As time | 74473 seconds = 20 h 41 min 13 s |
Is 74473 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (74473 ÷ 7 = 10639) | 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 7) | 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 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 74473 a prime number?
No. 74473 = 7 × 10639, so it is divisible by 7.
What are the factors of 74473?
1, 7, 10639, 74473.
What is 74473 in binary?
10010001011101001 (hexadecimal 122E9, octal 221351).
What is the square root of 74473?
About 272.8974.
Is 74473 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 74473?
74473 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 7 × 10639, the product of two primes.