43411370209 has 2 divisors, whose sum is σ = 43411370210. Its totient is φ = 43411370208.

The previous prime is 43411370173. The next prime is 43411370213. The reversal of 43411370209 is 90207311434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29964648609 + 13446721600 = 173103^2 + 115960^2 .

It is a cyclic number.

It is not a de Polignac number, because 43411370209 - 2¹⁹ = 43410845921 is a prime.

It is not a weakly prime, because it can be changed into another prime (43411370239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21705685104 + 21705685105.

It is an arithmetic number, because the mean of its divisors is an integer number (21705685105).

Almost surely, 2^43411370209 is an apocalyptic number.

It is an amenable number.

43411370209 is a deficient number, since it is larger than the sum of its proper divisors (1).

43411370209 is an equidigital number, since it uses as much as digits as its factorization.

43411370209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 43411370209 in words is "forty-three billion, four hundred eleven million, three hundred seventy thousand, two hundred nine".