423404503 has 4 divisors (see below), whose sum is σ = 423469168. Its totient is φ = 423339840.

The previous prime is 423404461. The next prime is 423404519. The reversal of 423404503 is 305404324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423404503 - 2⁹ = 423403991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423404573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21243 + ... + 36028.

It is an arithmetic number, because the mean of its divisors is an integer number (105867292).

Almost surely, 2^423404503 is an apocalyptic number.

423404503 is a deficient number, since it is larger than the sum of its proper divisors (64665).

423404503 is an equidigital number, since it uses as much as digits as its factorization.

423404503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64664.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 423404503 is about 20576.7952558215. The cubic root of 423404503 is about 750.9052790017.

Adding to 423404503 its reverse (305404324), we get a palindrome (728808827).

The spelling of 423404503 in words is "four hundred twenty-three million, four hundred four thousand, five hundred three".