43430434309 has 2 divisors, whose sum is σ = 43430434310. Its totient is φ = 43430434308.

The previous prime is 43430434241. The next prime is 43430434357. The reversal of 43430434309 is 90343403434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42972046209 + 458388100 = 207297^2 + 21410^2 .

It is a cyclic number.

It is not a de Polignac number, because 43430434309 - 2¹¹ = 43430432261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43430434379) 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, 21715217154 + 21715217155.

It is an arithmetic number, because the mean of its divisors is an integer number (21715217155).

Almost surely, 2^43430434309 is an apocalyptic number.

It is an amenable number.

43430434309 is a deficient number, since it is larger than the sum of its proper divisors (1).

43430434309 is an equidigital number, since it uses as much as digits as its factorization.

43430434309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 37.

The spelling of 43430434309 in words is "forty-three billion, four hundred thirty million, four hundred thirty-four thousand, three hundred nine".