173 (number)
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173 (one hundred [and] seventy-three) is the natural number following 172 and preceding 174.
In mathematics
173 is:
- an odd number.
- a deficient number.
- an odious number.
- a balanced prime.[1]
- an Eisenstein prime with no imaginary part.
- a Sophie Germain prime.[2]
- a Pythagorean prime.
- a Higgs prime.
- an isolated prime.
- a regular prime.
- a sexy prime.
- a truncatable prime.
- an inconsummate number.[3]
- the sum of 2 squares: 22 + 132.
- the sum of three consecutive prime numbers: 53 + 59 + 61.
- Palindromic number in bases 3 (201023) and 9 (2129).
- the 40th prime number following 167 and preceding 179.