443818489 has 3 divisors (see below), whose sum is σ = 443839557. Its totient is φ = 443797422.

The previous prime is 443818477. The next prime is 443818517. The reversal of 443818489 is 984818344.

It is a happy number.

The square root of 443818489 is 21067.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 443818489 - 2⁵ = 443818457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (443818409) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10534 + ... + 31600.

It is an arithmetic number, because the mean of its divisors is an integer number (147946519).

Almost surely, 2^443818489 is an apocalyptic number.

443818489 is the 21067-th square number.

443818489 is the 10534-th centered octagonal number.

It is an amenable number.

443818489 is a deficient number, since it is larger than the sum of its proper divisors (21068).

443818489 is an frugal number, since it uses more digits than its factorization.

443818489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42134 (or 21067 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The cubic root of 443818489 is about 762.7843899851.

Multiplying 443818489 by its sum of digits (49), we get a square (21747105961 = 147469²).

The spelling of 443818489 in words is "four hundred forty-three million, eight hundred eighteen thousand, four hundred eighty-nine".