404004439957 has 2 divisors, whose sum is σ = 404004439958. Its totient is φ = 404004439956.

The previous prime is 404004439933. The next prime is 404004440009. The reversal of 404004439957 is 759934400404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260461205316 + 143543234641 = 510354^2 + 378871^2 .

It is a cyclic number.

It is not a de Polignac number, because 404004439957 - 2³¹ = 401856956309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404004439957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404004439457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202002219978 + 202002219979.

It is an arithmetic number, because the mean of its divisors is an integer number (202002219979).

Almost surely, 2^404004439957 is an apocalyptic number.

It is an amenable number.

404004439957 is a deficient number, since it is larger than the sum of its proper divisors (1).

404004439957 is an equidigital number, since it uses as much as digits as its factorization.

404004439957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 404004439957 in words is "four hundred four billion, four million, four hundred thirty-nine thousand, nine hundred fifty-seven".