43679841809 has 2 divisors, whose sum is σ = 43679841810. Its totient is φ = 43679841808.

The previous prime is 43679841797. The next prime is 43679841869. The reversal of 43679841809 is 90814897634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32978560000 + 10701281809 = 181600^2 + 103447^2 .

It is a cyclic number.

It is not a de Polignac number, because 43679841809 - 2²⁰ = 43678793233 is a prime.

It is not a weakly prime, because it can be changed into another prime (43679841869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21839920904 + 21839920905.

It is an arithmetic number, because the mean of its divisors is an integer number (21839920905).

Almost surely, 2^43679841809 is an apocalyptic number.

It is an amenable number.

43679841809 is a deficient number, since it is larger than the sum of its proper divisors (1).

43679841809 is an equidigital number, since it uses as much as digits as its factorization.

43679841809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 43679841809 in words is "forty-three billion, six hundred seventy-nine million, eight hundred forty-one thousand, eight hundred nine".