404434421431 has 2 divisors, whose sum is σ = 404434421432. Its totient is φ = 404434421430.

The previous prime is 404434421351. The next prime is 404434421449. The reversal of 404434421431 is 134124434404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404434421431 - 2¹³ = 404434413239 is a prime.

It is a super-3 number, since 3×404434421431³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404434431431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202217210715 + 202217210716.

It is an arithmetic number, because the mean of its divisors is an integer number (202217210716).

Almost surely, 2^404434421431 is an apocalyptic number.

404434421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

404434421431 is an equidigital number, since it uses as much as digits as its factorization.

404434421431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 404434421431 its reverse (134124434404), we get a palindrome (538558855835).

The spelling of 404434421431 in words is "four hundred four billion, four hundred thirty-four million, four hundred twenty-one thousand, four hundred thirty-one".