7729
7729 is a natural number that follows 7728 and precedes 7730. It is an odd composite number with the prime factorization 59 × 131. Consequently, its only positive divisors are 1, 59, 131, and 7729. Because the sum of its proper divisors (1 + 59 + 131 = 191) is less than 7729, the number is deficient. The two prime factors are both congruent to 3 modulo 4, which also implies that 7729 cannot be expressed as a sum of two squares.
Representations in other bases include binary 1111000110001, ternary 101121021, and hexadecimal 0x1E31.
Because it is the product of two distinct primes, 7729 is square-free and has exactly four divisors.