43682209 has 2 divisors, whose sum is σ = 43682210. Its totient is φ = 43682208.

The previous prime is 43682201. The next prime is 43682257. The reversal of 43682209 is 90228634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 451584 = 6575^2 + 672^2 .

It is a cyclic number.

It is not a de Polignac number, because 43682209 - 2³ = 43682201 is a prime.

It is not a weakly prime, because it can be changed into another prime (43682201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21841104 + 21841105.

It is an arithmetic number, because the mean of its divisors is an integer number (21841105).

Almost surely, 2^43682209 is an apocalyptic number.

It is an amenable number.

43682209 is a deficient number, since it is larger than the sum of its proper divisors (1).

43682209 is an equidigital number, since it uses as much as digits as its factorization.

43682209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 43682209 is about 6609.2517730829. The cubic root of 43682209 is about 352.1828450235.

The spelling of 43682209 in words is "forty-three million, six hundred eighty-two thousand, two hundred nine".