7×89

7×89 denotes the product of the integers 7 and 89. The multiplication equals 623.

Both factors are primes, so 7×89 is a semiprime, the product of two primes. The prime factorization of 623 is 7×89.

89 is a Fibonacci number (the 11th) and is prime; 7 is also prime. The digit sum of 623 is 11, and it is not divisible by 3 or 5. In binary, 623 equals 1001101111; in hexadecimal, it is 0x26F.

As a semiprime, 623 appears in common number-theory examples illustrating factorization and the properties of products of two primes. Its small size means it has limited cryptographic relevance, but it provides a concrete example of how prime factors determine a composite number.