404312123 has 4 divisors (see below), whose sum is σ = 404805408. Its totient is φ = 403818840.

The previous prime is 404312089. The next prime is 404312131. The reversal of 404312123 is 321213404.

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 404312123 - 2⁶ = 404312059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404312095 and 404312104.

It is not an unprimeable number, because it can be changed into a prime (404312023) 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, 245411 + ... + 247052.

It is an arithmetic number, because the mean of its divisors is an integer number (101201352).

Almost surely, 2^404312123 is an apocalyptic number.

404312123 is a deficient number, since it is larger than the sum of its proper divisors (493285).

404312123 is an equidigital number, since it uses as much as digits as its factorization.

404312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493284.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 404312123 is about 20107.5140929952. The cubic root of 404312123 is about 739.4445082442. Note that the first 3 decimals are identical.

Adding to 404312123 its reverse (321213404), we get a palindrome (725525527).

The spelling of 404312123 in words is "four hundred four million, three hundred twelve thousand, one hundred twenty-three".