173 (number)

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.
• an Eisenstein prime with no imaginary part.
• a Sophie Germain prime.
• a Pythagorean prime.
• a Higgs prime.
• an isolated prime.
• a regular prime.
• a sexy prime.
• a twice sexy prime (167, 173; 173, 179).
• a truncatable prime.
• an inconsummate number.
• 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.

References

External links

• Number Facts and Trivia: 173
• Prime curiosities: 173
• Number Gossip: 173