Adding to 123423303 its reverse (303324321), we get a palindrome (426747624).
It is a semiprime because it is the product of two primes.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 123423303.
It is a congruent number.
Almost surely, 2123423303 is an apocalyptic number.
123423303 is an equidigital number, since it uses as much as digits as its factorization.
123423303 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 41141104.
The square root of 123423303 is about 11109.6040883553. The cubic root of 123423303 is about 497.8888358512. Note that the first 4 decimals are identical.
The spelling of 123423303 in words is "one hundred twenty-three million, four hundred twenty-three thousand, three hundred three".