423903 has 4 divisors (see below), whose sum is σ = 565208. Its totient is φ = 282600.

The previous prime is 423887. The next prime is 423931. The reversal of 423903 is 309324.

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

It is not a de Polignac number, because 423903 - 2⁴ = 423887 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 423903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70648 + ... + 70653.

It is an arithmetic number, because the mean of its divisors is an integer number (141302).

2⁴²³⁹⁰³ is an apocalyptic number.

423903 is a deficient number, since it is larger than the sum of its proper divisors (141305).

423903 is a wasteful number, since it uses less digits than its factorization.

423903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141304.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 423903 is about 651.0783363006. The cubic root of 423903 is about 75.1199857211.

It can be divided in two parts, 423 and 903, that added together give a triangular number (1326 = T₅₁).

The spelling of 423903 in words is "four hundred twenty-three thousand, nine hundred three".