39.7 would be written either
thirty-nine point seven
or
thirty-nine and seven tenths.
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Three hundred ninety-seven and seventy-five hundredths (397.75).
397 is a prime number, therefore prime factorization of 397 = 397.
The number 397 is a prime number, so it only has two factors: 1 and 397.
The least common multiple of 397 and 1 is 397.
1, 397.