404123243 has 4 divisors (see below), whose sum is σ = 408289560. Its totient is φ = 399956928.

The previous prime is 404123227. The next prime is 404123261. The reversal of 404123243 is 342321404.

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 404123243 - 2⁴ = 404123227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404123543) 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, 2083013 + ... + 2083206.

It is an arithmetic number, because the mean of its divisors is an integer number (102072390).

Almost surely, 2^404123243 is an apocalyptic number.

404123243 is a deficient number, since it is larger than the sum of its proper divisors (4166317).

404123243 is an equidigital number, since it uses as much as digits as its factorization.

404123243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166316.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404123243 is about 20102.8167926786. The cubic root of 404123243 is about 739.3293430658.

Adding to 404123243 its reverse (342321404), we get a palindrome (746444647).

The spelling of 404123243 in words is "four hundred four million, one hundred twenty-three thousand, two hundred forty-three".