- The spiral shapes of sunflowers follow a Fibonacci sequence.
- The Fibonacci sequence is encoded in the number 1/89. 1/89 = 0.01 + 0.001 + 0.0002 + 0.00003 + 0.000005 + 0.0000008 + 0.00000013 + 0.000000021 + 0.0000000034 etc.
- Zero is the only number that can't be represented in Roman numerals.
- 10! seconds is exactly 6 weeks.
- 555 is used by some in Thailand as slang for "hahaha", because the word for "five" is pronounced "ha".
- There are just four numbers (after 1) which are the sums of the cubes of their digits. These numbers are termed as Amstong numbers.
153 = 1^3 + 5^3 + 3^3
370 = 3^3 + 7^3 + 0^3
371 = 3^3 + 7^3 + 1^3
407 = 4^3 + 0^3 + 7^3