43561689 has 4 divisors (see below), whose sum is σ = 58082256. Its totient is φ = 29041124.

The previous prime is 43561681. The next prime is 43561703. The reversal of 43561689 is 98616534.

43561689 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43561689 - 2³ = 43561681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43561689.

It is not an unprimeable number, because it can be changed into a prime (43561681) 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, 7260279 + ... + 7260284.

It is an arithmetic number, because the mean of its divisors is an integer number (14520564).

Almost surely, 2^43561689 is an apocalyptic number.

It is an amenable number.

43561689 is a deficient number, since it is larger than the sum of its proper divisors (14520567).

43561689 is a wasteful number, since it uses less digits than its factorization.

43561689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520566.

The product of its digits is 155520, while the sum is 42.

The square root of 43561689 is about 6600.1279533051. The cubic root of 43561689 is about 351.8586537568.

The spelling of 43561689 in words is "forty-three million, five hundred sixty-one thousand, six hundred eighty-nine".