167

167 is a natural number that comes after 166 and before 168. It is a prime number, and it is the 39th prime in the sequence of positive integers.

In decimal form its digits are 1, 6 and 7; the sum of digits is 14, and the digital root is 5. As a prime, its only positive divisors are 1 and 167, and it is odd and square-free.

In other base representations, 167 equals 10100111 in binary, 247 in octal, and A7 in hexadecimal. In Roman numerals it is CLXVII.

Historically, the year 167 CE fell in the middle of the 2nd century during the Roman Empire, within the period of the Antonine dynasty.