# 193 (number)

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 ← 192 193 194 →
Cardinalone hundred ninety-three
Ordinal193rd
(one hundred ninety-third)
Factorizationprime
Prime44th
Divisors1, 193
Greek numeralΡϞΓ´
Roman numeralCXCIII
Binary110000012
Ternary210113
Octal3018
Duodecimal14112
HexadecimalC116

193 (one hundred [and] ninety-three) is the natural number following 192 and preceding 194.

## In mathematics

• 193 is an odd number
• 193 is a centered 32-gonal number
• 193 is a happy number
• 193 is a lucky number
• 193 is an odious number
• 193 is a square-free number
• 193 is the sum of 2 square numbers: 122 + 72 (or 144 + 49)
• 193 is the difference of 2 square numbers: 972 - 962 (or 9409 - 9216)
• 193 is a prime number
• 193 can be written as the difference between the product and the sum of the first four primes
• 193 is a twin number
• 193/71 is the most accurate approximation of Euler's Number (e) such that both the numerator and the denominator are integers less than 200 (approx. 99.99897% accurate)

193 is also: