# Number Trivia

Contents

## Number Anagrams

To do: Add some number anagrams.

## 2

Two (2) is the only prime number whose English name does not end in “e” or “n”.

## 168

There are 168 prime numbers between 1 and 1,000.

There are 168 hours in one week.

## 370

$$370 = 3^3 + 7^3 + 0^3$$ — 370 is a narcissistic number.

## 2187

$$2187 = 3^7$$

$$2187 = 10000000_3 \textrm{ (10,000,000 base 3)}$$

$$2187 + 1234 = 3421$$
$$2187 + 12345 = 14532$$
$$2187 + 123456 = 125643$$
$$2187 + 1234567 = 1236754$$
$$2187 + 12345678 = 12347865$$
$$2187 + 123456789 = 123458976$$
The sums on the right are anagrams of the numbers added to $$2187$$.
$$2187 + 123 = 2310$$ sort of fits this pattern.

$$2-1-8+7 = 0$$

$$2+1+8+7 = 18 \rightarrow 1+8 = 9$$ — 2187 is divisible by 9.

$$2187$$ is a Lucky number.

### 2187 Anagrams

Exchange the last two digits of $$2187$$ to make $$2178$$, multiply by $$4$$, and you get $$8712$$, the second number backward.

Take $$2187$$ from $$9999$$ and the result is $$7812$$, its reversal.

Multiplying $$21$$ by $$87$$ produces $$1827$$.

The first four digits of the constant $$e$$ are $$2.718$$.

The number of cubic inches in a cubic foot ($$12^3$$) is $$1728.$$