444643 has 4 divisors (see below), whose sum is σ = 450808. Its totient is φ = 438480.

The previous prime is 444641. The next prime is 444649. The reversal of 444643 is 346444.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 444643 - 2¹ = 444641 is a prime.

It is a d-powerful number, because it can be written as 4² + 4⁵ + 6³ + 4⁶ + 4⁹ + 3¹¹ .

It is a Duffinian number.

444643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (444641) 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, 2973 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (112702).

2⁴⁴⁴⁶⁴³ is an apocalyptic number.

444643 is a deficient number, since it is larger than the sum of its proper divisors (6165).

444643 is an equidigital number, since it uses as much as digits as its factorization.

444643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164.

The product of its digits is 4608, while the sum is 25.

The square root of 444643 is about 666.8155667049. The cubic root of 444643 is about 76.3256456136.

It can be divided in two parts, 4446 and 43, that added together give a square (4489 = 67²).

The spelling of 444643 in words is "four hundred forty-four thousand, six hundred forty-three".