434856217709 has 2 divisors, whose sum is σ = 434856217710. Its totient is φ = 434856217708.

The previous prime is 434856217637. The next prime is 434856217711. The reversal of 434856217709 is 907712658434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346455846025 + 88400371684 = 588605^2 + 297322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434856217709 is a prime.

Together with 434856217711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434856217409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217428108854 + 217428108855.

It is an arithmetic number, because the mean of its divisors is an integer number (217428108855).

It is a 1-persistent number, because it is pandigital, but 2⋅434856217709 = 869712435418 is not.

Almost surely, 2^434856217709 is an apocalyptic number.

It is an amenable number.

434856217709 is a deficient number, since it is larger than the sum of its proper divisors (1).

434856217709 is an equidigital number, since it uses as much as digits as its factorization.

434856217709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 434856217709 in words is "four hundred thirty-four billion, eight hundred fifty-six million, two hundred seventeen thousand, seven hundred nine".