43243609 has 8 divisors (see below), whose sum is σ = 44179328. Its totient is φ = 42316560.

The previous prime is 43243589. The next prime is 43243621. The reversal of 43243609 is 90634234.

43243609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43243609 - 2¹⁹ = 42719321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43243649) 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 7 ways as a sum of consecutive naturals, for example, 8464 + ... + 12574.

It is an arithmetic number, because the mean of its divisors is an integer number (5522416).

Almost surely, 2^43243609 is an apocalyptic number.

It is an amenable number.

43243609 is a deficient number, since it is larger than the sum of its proper divisors (935719).

43243609 is a wasteful number, since it uses less digits than its factorization.

43243609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 43243609 is about 6575.9873022992. The cubic root of 43243609 is about 351.0001569251. Note that the first 3 decimals are identical.

The spelling of 43243609 in words is "forty-three million, two hundred forty-three thousand, six hundred nine".