The number 77473
77473 is a composite number with 4 divisors. Its prime factorisation is 11 × 7043. Divisors (4): 1, 11, 7043, 77473.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77473: a semiprime: 11 × 7043, the product of two primes.
- 2
77473 is composite. Its prime factorisation is
- 3
The divisors add up to 84528; without 77473 itself that is 7055, so 77473 is deficient (7055 is less than 77473). Euler's totient φ(77473) = 70420 numbers up to 77473 share no factor with it.
- 4
The digits of 77473 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77473 = 11 \times 7043 \]
77473 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 84528 |
| Euler totient φ(n) | 70420 |
| Square | 6002065729 |
| Cube | 464998038222817 |
| Square root | 278.339720 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 76 |
| Scientific notation | 7.7473 × |
77473 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand four hundred and seventy-three |
| Binary (base 2) | 10010111010100001 |
| Octal (base 8) | 227241 |
| Hexadecimal (base 16) | 12EA1 |
| Base 3 | 10221021101 |
| As time | 77473 seconds = 21 h 31 min 13 s |
Is 77473 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 | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 | Yes (77473 ÷ 11 = 7043) | 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 77473 a prime number?
No. 77473 = 11 × 7043, so it is divisible by 11.
What are the factors of 77473?
1, 11, 7043, 77473.
What is 77473 in binary?
10010111010100001 (hexadecimal 12EA1, octal 227241).
What is the square root of 77473?
About 278.3397.
Is 77473 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 77473?
77473 is a semiprime: 11 × 7043, the product of two primes.