404636413 has 4 divisors (see below), whose sum is σ = 404689600. Its totient is φ = 404583228.

The previous prime is 404636387. The next prime is 404636417. The reversal of 404636413 is 314636404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404636413 - 2⁵ = 404636381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404636417) 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, 12795 + ... + 31192.

It is an arithmetic number, because the mean of its divisors is an integer number (101172400).

Almost surely, 2^404636413 is an apocalyptic number.

It is an amenable number.

404636413 is a deficient number, since it is larger than the sum of its proper divisors (53187).

404636413 is an equidigital number, since it uses as much as digits as its factorization.

404636413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53186.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 404636413 is about 20115.5763775240. The cubic root of 404636413 is about 739.6421528882.

Subtracting from 404636413 its reverse (314636404), we obtain a palindrome (90000009).

The spelling of 404636413 in words is "four hundred four million, six hundred thirty-six thousand, four hundred thirteen".