43244809 has 2 divisors, whose sum is σ = 43244810. Its totient is φ = 43244808.

The previous prime is 43244777. The next prime is 43244843. The reversal of 43244809 is 90844234.

43244809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (43244843) can be obtained adding 43244809 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36869184 + 6375625 = 6072^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 43244809 - 2⁵ = 43244777 is a prime.

It is a super-2 number, since 2×43244809² = 3740227010892962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43244879) 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 as a sum of consecutive naturals, namely, 21622404 + 21622405.

It is an arithmetic number, because the mean of its divisors is an integer number (21622405).

Almost surely, 2^43244809 is an apocalyptic number.

It is an amenable number.

43244809 is a deficient number, since it is larger than the sum of its proper divisors (1).

43244809 is an equidigital number, since it uses as much as digits as its factorization.

43244809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 43244809 is about 6576.0785427183. The cubic root of 43244809 is about 351.0034036190.

The spelling of 43244809 in words is "forty-three million, two hundred forty-four thousand, eight hundred nine".