**2133**= 3

^{3}x 79.

**2133**is a 2-hyperperfect number.

**2133**is an octagonal number.

**2133**is a lucky number that is divisible by the sum of its digits (9).

**2133**Mini-Note

**is a small laptop computer.**

Source: Prime Curios!

124,367,958 = **627 **x 198354 = 9 x 26 x 531487. Note that the numbers in each expression use each digit from 1 to 9 once.

Source: Wikipedia

Source: Number Gossip

Source: Number Gossip

Labels:
centered triangular number,
semiprime

Source: Prime Curios!

Labels:
pentagonal number,
sphenic number

The sum of its divisors, including **70** itself, is a square (144): 1 + 2 + 5 + 7 + 10 + 14 + 35 + **70** = 144 = 12^{2}.

Source: *The Penguin Dictionary of Curious and Interesting Numbers*, rev. ed., by David Wells.

Labels:
pentatope number,
sphenic number

Marco Polo left Venice in the year

Source: Prime Curios!

Source: Positive Integers

The sum of the base 3 digits of **812 **equals the sum of the base 9 digits of **812**: (1 + 0 + 1 + 0 + 0 + 0 + 2) = (1 + 1 + 0 + 2) = 4.

Labels:
nonagonal number,
sphenic number

Source: Phillips, R. 2004. *Numbers: Facts, Figures and Fiction*. Badsey Publications.

Labels:
sphenic number,
triangular number

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