2929

2929 is a natural number that follows 2928 and precedes 2930. In mathematics, it is notable as a semiprime, since it factorizes as 29 × 101. This makes it square-free and gives it exactly four positive divisors: 1, 29, 101, and 2929. It is odd and its totient is φ(2929) = (29 − 1)(101 − 1) = 28 × 100 = 2800.

In numeral representations, 2929 is written as 0xB71 in hexadecimal, and as 101101110001 in binary. In Roman numerals it is MMCMXXIX.

As a number, 2929 has properties that illustrate basic concepts in number theory. It is not a prime, not a perfect square, and its prime factorization consists of two distinct primes. It is congruent to 1 modulo 3, modulo 4, and modulo 8, among other residues, reflecting its odd, semiprime nature.

In practical contexts, semiprimes like 2929 are commonly used in introductory discussions of factorization and primality. While they are of theoretical interest in number theory, 2929 is far too small for cryptographic use, where much larger semiprimes are required.

See also: semiprime, prime factorization, Roman numerals.