43161009 has 4 divisors (see below), whose sum is σ = 57548016. Its totient is φ = 28774004.

The previous prime is 43160917. The next prime is 43161049. The reversal of 43161009 is 90016134.

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 43161009 - 2¹¹ = 43158961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43161009.

It is not an unprimeable number, because it can be changed into a prime (43161049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7193499 + ... + 7193504.

It is an arithmetic number, because the mean of its divisors is an integer number (14387004).

Almost surely, 2^43161009 is an apocalyptic number.

It is an amenable number.

43161009 is a deficient number, since it is larger than the sum of its proper divisors (14387007).

43161009 is a wasteful number, since it uses less digits than its factorization.

43161009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387006.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 43161009 is about 6569.7038746050. The cubic root of 43161009 is about 350.7765316470.

The spelling of 43161009 in words is "forty-three million, one hundred sixty-one thousand, nine".