In Mathematics
- 173 is an odd number, a deficient number, and an odious number. It is a balanced prime, an Eisenstein prime with no imaginary part, and a Sophie Germain prime. It is also an inconsummate number.
173 is the sum of 2 squares: . It is also the sum of three consecutive prime numbers: 53 + 59 + 61.
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“It is a monstrous thing to force a child to learn Latin or Greek or mathematics on the ground that they are an indispensable gymnastic for the mental powers. It would be monstrous even if it were true.”
—George Bernard Shaw (1856–1950)