43093909 has 2 divisors, whose sum is σ = 43093910. Its totient is φ = 43093908.

The previous prime is 43093873. The next prime is 43093943. The reversal of 43093909 is 90939034.

43093909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 152100 = 6553^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 43093909 - 2¹³ = 43085717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43093979) 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, 21546954 + 21546955.

It is an arithmetic number, because the mean of its divisors is an integer number (21546955).

Almost surely, 2^43093909 is an apocalyptic number.

It is an amenable number.

43093909 is a deficient number, since it is larger than the sum of its proper divisors (1).

43093909 is an equidigital number, since it uses as much as digits as its factorization.

43093909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 43093909 is about 6564.5951131810. The cubic root of 43093909 is about 350.5946598323.

The spelling of 43093909 in words is "forty-three million, ninety-three thousand, nine hundred nine".