37 is an odd prime number

A number represented by a whole number and a fraction (for example, 1 1/2 - one and a half) is called a mixed number.

The number obtained by doubling a prime number:

-- is an even number

-- is a composite number

-- has exactly four factors: 1, 2, the original prime number if different from 2, the new number

The number of protons in an atom is the atomic number. It tells you which element the atom is.

The number of protons in an atom is its atomic number.