443004421 has 4 divisors (see below), whose sum is σ = 443141452. Its totient is φ = 442867392.

The previous prime is 443004413. The next prime is 443004427. The reversal of 443004421 is 124400344.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200081025 + 242923396 = 14145^2 + 15586^2 .

It is a cyclic number.

It is not a de Polignac number, because 443004421 - 2³ = 443004413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 443004392 and 443004401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443004427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63546 + ... + 70171.

It is an arithmetic number, because the mean of its divisors is an integer number (110785363).

Almost surely, 2^443004421 is an apocalyptic number.

It is an amenable number.

443004421 is a deficient number, since it is larger than the sum of its proper divisors (137031).

443004421 is a wasteful number, since it uses less digits than its factorization.

443004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137030.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 443004421 is about 21047.6702036116. The cubic root of 443004421 is about 762.3177289311.

Adding to 443004421 its reverse (124400344), we get a palindrome (567404765).

The spelling of 443004421 in words is "four hundred forty-three million, four thousand, four hundred twenty-one".