12209443 has 4 divisors (see below), whose sum is σ = 12603328. Its totient is φ = 11815560.

The previous prime is 12209441. The next prime is 12209447. The reversal of 12209443 is 34490221.

12209443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34490221 = 281 ⋅122741.

It is a cyclic number.

It is not a de Polignac number, because 12209443 - 2¹ = 12209441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209441) 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, 196896 + ... + 196957.

It is an arithmetic number, because the mean of its divisors is an integer number (3150832).

Almost surely, 2^12209443 is an apocalyptic number.

12209443 is a deficient number, since it is larger than the sum of its proper divisors (393885).

12209443 is an equidigital number, since it uses as much as digits as its factorization.

12209443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393884.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 12209443 is about 3494.2013393621. The cubic root of 12209443 is about 230.2671313366.

Adding to 12209443 its reverse (34490221), we get a palindrome (46699664).

The spelling of 12209443 in words is "twelve million, two hundred nine thousand, four hundred forty-three".