4443423421 has 8 divisors (see below), whose sum is σ = 4553741304. Its totient is φ = 4333198080.

The previous prime is 4443423419. The next prime is 4443423431. The reversal of 4443423421 is 1243243444.

It can be written as a sum of positive squares in 4 ways, for example, as 41100921 + 4402322500 = 6411^2 + 66350^2 .

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 4443423421 - 2¹ = 4443423419 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 (4443423401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79681 + ... + 123433.

It is an arithmetic number, because the mean of its divisors is an integer number (569217663).

Almost surely, 2^4443423421 is an apocalyptic number.

4443423421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4443423421 is a deficient number, since it is larger than the sum of its proper divisors (110317883).

4443423421 is a wasteful number, since it uses less digits than its factorization.

4443423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46271.

The product of its digits is 36864, while the sum is 31.

The square root of 4443423421 is about 66659.0085509828. The cubic root of 4443423421 is about 1644.0154702272.

Adding to 4443423421 its reverse (1243243444), we get a palindrome (5686666865).

The spelling of 4443423421 in words is "four billion, four hundred forty-three million, four hundred twenty-three thousand, four hundred twenty-one".