404004431471 has 2 divisors, whose sum is σ = 404004431472. Its totient is φ = 404004431470.

The previous prime is 404004431437. The next prime is 404004431569. The reversal of 404004431471 is 174134400404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404004431471 - 2²² = 404000237167 is a prime.

It is a super-3 number, since 3×404004431471³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404004431371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202002215735 + 202002215736.

It is an arithmetic number, because the mean of its divisors is an integer number (202002215736).

Almost surely, 2^404004431471 is an apocalyptic number.

404004431471 is a deficient number, since it is larger than the sum of its proper divisors (1).

404004431471 is an equidigital number, since it uses as much as digits as its factorization.

404004431471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 32.

Adding to 404004431471 its reverse (174134400404), we get a palindrome (578138831875).

The spelling of 404004431471 in words is "four hundred four billion, four million, four hundred thirty-one thousand, four hundred seventy-one".