979

979 is an integer that lies between 978 and 980. It is odd and composite, with prime factorization 11 × 89, making it a semiprime. In decimal notation it is a palindrome, reading the same forwards and backwards.

In other base representations, 979 equals 1111010011 in binary and 0x3D3 in hexadecimal, the latter also a palindrome. In Roman numerals, 979 is written as CMLXXIX.

As a calendar year, AD 979 falls in the late 10th century, a period marked by various political and cultural developments across Europe, the Byzantine world, and parts of the Islamic world. The specific events of that year vary by region and source.

From a number-theoretic perspective, 979 is notable for its simplicity of factorization as a product of two primes and for being a palindromic number in base 10. It is not representable as a sum of two squares because the prime factor 11 is congruent to 3 modulo 4 and appears to an odd exponent. This combination—being both a palindrome and a semiprime—places 979 in a small class of integers with curious structural properties.

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