43609189 has 4 divisors (see below), whose sum is σ = 46963756. Its totient is φ = 40254624.

The previous prime is 43609187. The next prime is 43609277. The reversal of 43609189 is 98190634.

43609189 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 can be written as a sum of positive squares in 2 ways, for example, as 20884900 + 22724289 = 4570^2 + 4767^2 .

It is a cyclic number.

It is not a de Polignac number, because 43609189 - 2¹ = 43609187 is a prime.

It is a super-2 number, since 2×43609189² = 3803522730475442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43609187) 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, 1677264 + ... + 1677289.

It is an arithmetic number, because the mean of its divisors is an integer number (11740939).

Almost surely, 2^43609189 is an apocalyptic number.

It is an amenable number.

43609189 is a deficient number, since it is larger than the sum of its proper divisors (3354567).

43609189 is a wasteful number, since it uses less digits than its factorization.

43609189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354566.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 43609189 is about 6603.7253879912. The cubic root of 43609189 is about 351.9864970931.

The spelling of 43609189 in words is "forty-three million, six hundred nine thousand, one hundred eighty-nine".