2044643 has 4 divisors (see below), whose sum is σ = 2047920. Its totient is φ = 2041368.

The previous prime is 2044633. The next prime is 2044649. The reversal of 2044643 is 3464402.

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 2044643 - 2¹⁸ = 1782499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2044649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (511980).

2^2044643 is an apocalyptic number.

2044643 is a deficient number, since it is larger than the sum of its proper divisors (3277).

2044643 is an equidigital number, since it uses as much as digits as its factorization.

2044643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2044643 is about 1429.9101370366. The cubic root of 2044643 is about 126.9226594227.

The spelling of 2044643 in words is "two million, forty-four thousand, six hundred forty-three".