94 (number)
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94 is a natural number that lies between 93 and 95. It is an even number, since 2 divides it. It is also a composite number, meaning it has divisors other than 1 and itself.
In the standard decimal notation, 94 consists of 9 in the tens place and 4 in the units place. In binary, it is written as 1011110. In Roman numerals, it is XCIV.
Mathematical properties
94 factors as 2 × 47, where both factors are prime. It is therefore a semiprime, the product of two primes. Its divisors are 1, 2, 47, and 94; their sum is 144. Since the sum of its proper divisors (1 + 2 + 47 = 50) is less than 94, it is a deficient number.
The sum of the digits of 94 is 9 + 4 = 13. The sum of the digits of its prime factorization is also 2 + 4 + 7 = 13. Because of this equality, 94 is classified as a Smith number.
General applications
In chemistry, 94 is the atomic number of plutonium. In the international telephone numbering system, +94 is the country code for Sri Lanka. As a year, 94 is commonly used as shorthand for 1994 or 894 when the meaning is clear.