404923 has 4 divisors (see below), whose sum is σ = 428760. Its totient is φ = 381088.

The previous prime is 404851. The next prime is 404941. The reversal of 404923 is 329404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404923 is a prime.

It is a Duffinian number.

404923 is a lucky number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 404894 and 404903.

It is not an unprimeable number, because it can be changed into a prime (404983) 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, 11893 + ... + 11926.

It is an arithmetic number, because the mean of its divisors is an integer number (107190).

2⁴⁰⁴⁹²³ is an apocalyptic number.

404923 is a deficient number, since it is larger than the sum of its proper divisors (23837).

404923 is a wasteful number, since it uses less digits than its factorization.

404923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23836.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 404923 is about 636.3356032786. The cubic root of 404923 is about 73.9816730851.

The spelling of 404923 in words is "four hundred four thousand, nine hundred twenty-three".