698

698 is the natural number that follows 697 and precedes 699. It is an even, composite number. The prime factorization of 698 is 2 × 349; since 349 is prime, 698 is a semiprime. Its positive divisors are 1, 2, 349, and 698. The sum of its proper divisors is 352, which is less than 698, making 698 a deficient number (not perfect or abundant).

In Roman numerals, 698 is written as DCXCVIII. Representations in other bases include binary 1010111010, hexadecimal 0x2BA, and octal 1272.

Contextual notes: 698 is not a Fibonacci number, and it is neither a square nor a cube. As an even semiprime, it provides a simple example of a number with exactly four divisors. Its factorization also gives a straightforward demonstration of divisor sums and deficiency within elementary number theory.