168348209 has 2 divisors, whose sum is σ = 168348210. Its totient is φ = 168348208.

The previous prime is 168348199. The next prime is 168348233. The reversal of 168348209 is 902843861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91259809 + 77088400 = 9553^2 + 8780^2 .

It is an emirp because it is prime and its reverse (902843861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168348209 - 2⁸ = 168347953 is a prime.

It is a super-2 number, since 2×168348209² = 56682238947015362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (168348269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84174104 + 84174105.

It is an arithmetic number, because the mean of its divisors is an integer number (84174105).

Almost surely, 2^168348209 is an apocalyptic number.

It is an amenable number.

168348209 is a deficient number, since it is larger than the sum of its proper divisors (1).

168348209 is an equidigital number, since it uses as much as digits as its factorization.

168348209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 168348209 is about 12974.9068975465. The cubic root of 168348209 is about 552.1657953021.

The spelling of 168348209 in words is "one hundred sixty-eight million, three hundred forty-eight thousand, two hundred nine".