404124409 has 4 divisors (see below), whose sum is σ = 435210916. Its totient is φ = 373037904.

The previous prime is 404124361. The next prime is 404124431. The reversal of 404124409 is 904421404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149817600 + 254306809 = 12240^2 + 15947^2 .

It is a cyclic number.

It is not a de Polignac number, because 404124409 - 2⁹ = 404123897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404124439) 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, 15543234 + ... + 15543259.

It is an arithmetic number, because the mean of its divisors is an integer number (108802729).

Almost surely, 2^404124409 is an apocalyptic number.

It is an amenable number.

404124409 is a deficient number, since it is larger than the sum of its proper divisors (31086507).

404124409 is a wasteful number, since it uses less digits than its factorization.

404124409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31086506.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 404124409 is about 20102.8457935686. The cubic root of 404124409 is about 739.3300541172.

The spelling of 404124409 in words is "four hundred four million, one hundred twenty-four thousand, four hundred nine".