13129173

13129173 is a natural number. In decimal notation it is eight digits long, equal to 13,129,173, and its decimal digits are 1, 3, 1, 2, 9, 1, 7, 3.

Mathematical properties include its divisibility and factorization. The sum of its digits is 27, which makes the number divisible by 9. Indeed, 13,129,173 = 9 × 1,458,797, so the number is composite and not prime. It is odd, so it is not divisible by 2 or 5, and a divisibility check by 7 yields a remainder of 1, indicating it is not divisible by 7. A divisibility test for 11 gives a difference of −9 between the sums of alternating digits, indicating it is not divisible by 11. The prime factorization can be written as 13,129,173 = 3^2 × 1,458,797, where 1,458,797 is an odd cofactor not divisible by 3.

In other representations, the same value can be viewed as a data identifier or numeric example in computational contexts, illustrating properties of eight-digit integers: a multiple of 9, with a digit sum of 27, and a composite number with a nontrivial cofactor.

See also: examples of decimal digits sums, divisibility rules, and basic integer factorization.