404113639 has 2 divisors, whose sum is σ = 404113640. Its totient is φ = 404113638.

The previous prime is 404113631. The next prime is 404113691. The reversal of 404113639 is 936311404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404113639 - 2³ = 404113631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404113639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404113631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202056819 + 202056820.

It is an arithmetic number, because the mean of its divisors is an integer number (202056820).

Almost surely, 2^404113639 is an apocalyptic number.

404113639 is a deficient number, since it is larger than the sum of its proper divisors (1).

404113639 is an equidigital number, since it uses as much as digits as its factorization.

404113639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 404113639 is about 20102.5779192620. The cubic root of 404113639 is about 739.3234862920.

The spelling of 404113639 in words is "four hundred four million, one hundred thirteen thousand, six hundred thirty-nine".