2109443 has 4 divisors (see below), whose sum is σ = 2410800. Its totient is φ = 1808088.

The previous prime is 2109421. The next prime is 2109449. The reversal of 2109443 is 3449012.

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 2109443 - 2¹² = 2105347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2109449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150668 + ... + 150681.

It is an arithmetic number, because the mean of its divisors is an integer number (602700).

2^2109443 is an apocalyptic number.

2109443 is a deficient number, since it is larger than the sum of its proper divisors (301357).

2109443 is an equidigital number, since it uses as much as digits as its factorization.

2109443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301356.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2109443 is about 1452.3921646718. The cubic root of 2109443 is about 128.2495740999.

It can be divided in two parts, 2109 and 443, that added together give a palindrome (2552).

The spelling of 2109443 in words is "two million, one hundred nine thousand, four hundred forty-three".