no, 945 is the first abundant odd number though
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All odd numbers with one or two distinct prime factors are deficient. Since 3 and 7 are factors of 63, it must be deficient.
17 is a deficient number because half the sum its factors is less than 17 [(1 + 17)/2 = 9)]. All odd numbers less than 945 are deficient.
All of the odd numbers.
There are more deficient numbers.
Look for a table of prime numbers. All the odd numbers that are NOT on this list are composite numbers.