12403923 has 32 divisors (see below), whose sum is σ = 20093952. Its totient is φ = 6652800.

The previous prime is 12403921. The next prime is 12403933. The reversal of 12403923 is 32930421.

It is not a de Polignac number, because 12403923 - 2¹ = 12403921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12403893 and 12403902.

It is not an unprimeable number, because it can be changed into a prime (12403921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29253 + ... + 29673.

It is an arithmetic number, because the mean of its divisors is an integer number (627936).

Almost surely, 2^12403923 is an apocalyptic number.

12403923 is a deficient number, since it is larger than the sum of its proper divisors (7690029).

12403923 is a wasteful number, since it uses less digits than its factorization.

12403923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 12403923 is about 3521.9203568508. The cubic root of 12403923 is about 231.4833118382.

The spelling of 12403923 in words is "twelve million, four hundred three thousand, nine hundred twenty-three".