168343107749 has 2 divisors, whose sum is σ = 168343107750. Its totient is φ = 168343107748.

The previous prime is 168343107671. The next prime is 168343107763. The reversal of 168343107749 is 947701343861.

It is a happy number.

168343107749 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., 100850704900 + 67492402849 = 317570^2 + 259793^2 .

It is an emirp because it is prime and its reverse (947701343861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168343107749 - 2³² = 164048140453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168343107749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168343107769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84171553874 + 84171553875.

It is an arithmetic number, because the mean of its divisors is an integer number (84171553875).

Almost surely, 2^168343107749 is an apocalyptic number.

It is an amenable number.

168343107749 is a deficient number, since it is larger than the sum of its proper divisors (1).

168343107749 is an equidigital number, since it uses as much as digits as its factorization.

168343107749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 168343107749 in words is "one hundred sixty-eight billion, three hundred forty-three million, one hundred seven thousand, seven hundred forty-nine".