403923 has 8 divisors (see below), whose sum is σ = 580048. Its totient is φ = 248544.

The previous prime is 403901. The next prime is 403933. The reversal of 403923 is 329304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-403923 is a prime.

It is a Duffinian number.

403923 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 403923.

It is not an unprimeable number, because it can be changed into a prime (403933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5140 + ... + 5217.

It is an arithmetic number, because the mean of its divisors is an integer number (72506).

2⁴⁰³⁹²³ is an apocalyptic number.

403923 is a deficient number, since it is larger than the sum of its proper divisors (176125).

403923 is a wasteful number, since it uses less digits than its factorization.

403923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373.

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

The square root of 403923 is about 635.5493686568. The cubic root of 403923 is about 73.9207210369.

It can be divided in two parts, 403 and 923, that added together give a triangular number (1326 = T₅₁).

The spelling of 403923 in words is "four hundred three thousand, nine hundred twenty-three".