43043423 has 4 divisors (see below), whose sum is σ = 43126248. Its totient is φ = 42960600.

The previous prime is 43043411. The next prime is 43043443. The reversal of 43043423 is 32434034.

It is a happy number.

43043423 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.

It is a cyclic number.

It is not a de Polignac number, because 43043423 - 2⁶ = 43043359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43043443) 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, 40628 + ... + 41673.

It is an arithmetic number, because the mean of its divisors is an integer number (10781562).

Almost surely, 2^43043423 is an apocalyptic number.

43043423 is a deficient number, since it is larger than the sum of its proper divisors (82825).

43043423 is an equidigital number, since it uses as much as digits as its factorization.

43043423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82824.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 43043423 is about 6560.7486615477. The cubic root of 43043423 is about 350.4576950887.

Adding to 43043423 its reverse (32434034), we get a palindrome (75477457).

The spelling of 43043423 in words is "forty-three million, forty-three thousand, four hundred twenty-three".