43930009 has 4 divisors (see below), whose sum is σ = 44250804. Its totient is φ = 43609216.

The previous prime is 43929997. The next prime is 43930021. The reversal of 43930009 is 90003934.

43930009 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 an emirpimes, since its reverse is a distinct semiprime: 90003934 = 2 ⋅45001967.

It is an interprime number because it is at equal distance from previous prime (43929997) and next prime (43930021).

It can be written as a sum of positive squares in 2 ways, for example, as 21576025 + 22353984 = 4645^2 + 4728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43930009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43930079) 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, 160192 + ... + 160465.

It is an arithmetic number, because the mean of its divisors is an integer number (11062701).

Almost surely, 2^43930009 is an apocalyptic number.

It is an amenable number.

43930009 is a deficient number, since it is larger than the sum of its proper divisors (320795).

43930009 is a wasteful number, since it uses less digits than its factorization.

43930009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320794.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 43930009 is about 6627.9717108630. The cubic root of 43930009 is about 352.8475428179.

The spelling of 43930009 in words is "forty-three million, nine hundred thirty thousand, nine".