43380809 has 2 divisors, whose sum is σ = 43380810. Its totient is φ = 43380808.

The previous prime is 43380793. The next prime is 43380847. The reversal of 43380809 is 90808334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31956409 + 11424400 = 5653^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 43380809 - 2⁴ = 43380793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43380109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21690404 + 21690405.

It is an arithmetic number, because the mean of its divisors is an integer number (21690405).

Almost surely, 2^43380809 is an apocalyptic number.

It is an amenable number.

43380809 is a deficient number, since it is larger than the sum of its proper divisors (1).

43380809 is an equidigital number, since it uses as much as digits as its factorization.

43380809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 43380809 is about 6586.4109346441. The cubic root of 43380809 is about 351.3709738109.

The spelling of 43380809 in words is "forty-three million, three hundred eighty thousand, eight hundred nine".