97

97 is a natural number that follows 96 and precedes 98. In mathematics, 97 is a prime number; it is the largest two-digit prime and the 25th prime overall.

In numeral representations, 97 is written as 97 in decimal, 1100001 in binary, 141 in octal, and 0x61 in hexadecimal. In Roman numerals, it is written as XCVII.

In computing and encoding, the decimal value 97 is the ASCII code for the lowercase letter 'a'. It is also the Unicode code point U+0061.

In science, 97 is the atomic number of berkelium, a synthetic actinide element discovered in 1949 at the University of California, Berkeley. Berkelium, named after Berkeley, is highly radioactive and used mainly for scientific research.

In calendar terms, 97 is the 97th day of the year. In a common year it falls on April 7, while in a leap year it falls on April 6.