273

273 is a natural number that comes after 272 and before 274. It is an odd composite number with a prime factorization of 3 × 7 × 13, making it squarefree and a product of three distinct primes. The Euler totient function value for 273 is φ(273) = 144.

In various numeral systems, 273 has recognizable representations: binary 100010001, octal 421, and hexadecimal 0x111. These forms reflect its simple decomposition into distinct prime factors.

Digits of 273 sum to 12, so it is divisible by 3 (273 ÷ 3 = 91). Since 91 = 7 × 13, the full factorization is 3 × 7 × 13.

In calendar terms, 273 is the day-of-year marker that corresponds to September 30 in a common year (365 days). In a leap year, the 273rd day is September 29. The value 273 K is close to the freezing point of water, since 0 °C equals 273.15 K; thus 273 K is about −0.15 °C.

In historical chronology, 273 CE refers to a year in the later stage of the Crisis of the Third Century within the Roman Empire, a period marked by political instability and frequent transitions of power.

Overall, 273 is notable primarily for its factorization into three distinct primes, its simple base representations (binary, octal, hex), and its contextual ties to calendars and measurements near the freezing point of water.