423444333421 has 8 divisors (see below), whose sum is σ = 425037402944. Its totient is φ = 421852652640.

The previous prime is 423444333413. The next prime is 423444333461. The reversal of 423444333421 is 124333444324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423444333421 - 2³ = 423444333413 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 (423444333401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265816 + ... + 957886.

It is an arithmetic number, because the mean of its divisors is an integer number (53129675368).

Almost surely, 2^423444333421 is an apocalyptic number.

It is an amenable number.

423444333421 is a deficient number, since it is larger than the sum of its proper divisors (1593069523).

423444333421 is a wasteful number, since it uses less digits than its factorization.

423444333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694371.

The product of its digits is 331776, while the sum is 37.

Adding to 423444333421 its reverse (124333444324), we get a palindrome (547777777745).

The spelling of 423444333421 in words is "four hundred twenty-three billion, four hundred forty-four million, three hundred thirty-three thousand, four hundred twenty-one".