43201309 has 2 divisors, whose sum is σ = 43201310. Its totient is φ = 43201308.

The previous prime is 43201303. The next prime is 43201343. The reversal of 43201309 is 90310234.

43201309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24304900 + 18896409 = 4930^2 + 4347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43201309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43201309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43201303) 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, 21600654 + 21600655.

It is an arithmetic number, because the mean of its divisors is an integer number (21600655).

Almost surely, 2^43201309 is an apocalyptic number.

It is an amenable number.

43201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

43201309 is an equidigital number, since it uses as much as digits as its factorization.

43201309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 43201309 is about 6572.7702683115. The cubic root of 43201309 is about 350.8856725675.

The spelling of 43201309 in words is "forty-three million, two hundred one thousand, three hundred nine".