43409161 has 8 divisors (see below), whose sum is σ = 43812648. Its totient is φ = 43008000.

The previous prime is 43409159. The next prime is 43409183. The reversal of 43409161 is 16190434.

43409161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24443136 + 18966025 = 4944^2 + 4355^2 .

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 43409161 - 2¹ = 43409159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43409101) 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, 67401 + ... + 68041.

It is an arithmetic number, because the mean of its divisors is an integer number (5476581).

Almost surely, 2^43409161 is an apocalyptic number.

It is an amenable number.

43409161 is a deficient number, since it is larger than the sum of its proper divisors (403487).

43409161 is a wasteful number, since it uses less digits than its factorization.

43409161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 43409161 is about 6588.5628933782. The cubic root of 43409161 is about 351.4475045826.

Adding to 43409161 its reverse (16190434), we get a palindrome (59599595).

The spelling of 43409161 in words is "forty-three million, four hundred nine thousand, one hundred sixty-one".