168646349 has 2 divisors, whose sum is σ = 168646350. Its totient is φ = 168646348.

The previous prime is 168646319. The next prime is 168646351. The reversal of 168646349 is 943646861.

168646349 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., 139948900 + 28697449 = 11830^2 + 5357^2 .

It is an emirp because it is prime and its reverse (943646861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168646349 - 2¹⁶ = 168580813 is a prime.

Together with 168646351, 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 (168646319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84323174 + 84323175.

It is an arithmetic number, because the mean of its divisors is an integer number (84323175).

Almost surely, 2^168646349 is an apocalyptic number.

It is an amenable number.

168646349 is a deficient number, since it is larger than the sum of its proper divisors (1).

168646349 is an equidigital number, since it uses as much as digits as its factorization.

168646349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 168646349 is about 12986.3909151080. The cubic root of 168646349 is about 552.4915598309.

The spelling of 168646349 in words is "one hundred sixty-eight million, six hundred forty-six thousand, three hundred forty-nine".