23×149

23 is a prime number and 149 is also a prime. Their product, written as 23×149, equals 3427. The calculation is straightforward: 20×149 gives 2980 and 3×149 gives 447; adding these sums yields 3427. Because both factors are prime and distinct, 3427 is a semiprime – a composite number that is the product of exactly two primes. Its full prime factorization is simply 23 and 149. The divisors of 3427 are therefore 1, 23, 149, and 3427, giving it exactly four positive divisors. The number is odd, not divisible by 5, and its digit sum is 3+4+2+7=16, so it is not divisible by 3 or 9. 3427 is not a perfect square; its square root is between 58 and 59.

In elementary arithmetic, the expression 23×149 serves as a typical example for practicing multiplication with a one‑digit factor and a three‑digit factor. In number theory contexts, it illustrates properties of prime factorizations and semiprimes, which are important in cryptographic algorithms where products of two primes are used. This simple product also appears in tables of semiprime numbers and can be used to test algorithms that identify prime factors. While 3427 itself does not have a special historical or scientific significance, its structure as a product of two primes makes it a useful example in mathematics education and in discussions of integer factorization.