104 is the last number n, such that 9n is smaller than a googol.

104 is the second number with abundance 2.

Its prime factorization is 23 × 13.

The constant term in the McKay-Thomson series \(T_{2A}\) is equal to 104.

It is part of a Ruth–Aaron pair with 105.

It is also the number of playing cards in a rummy deck without jokers.

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