168768449 has 2 divisors, whose sum is σ = 168768450. Its totient is φ = 168768448.

The previous prime is 168768437. The next prime is 168768451. The reversal of 168768449 is 944867861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163660849 + 5107600 = 12793^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 168768449 - 2²⁰ = 167719873 is a prime.

Together with 168768451, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168768449.

It is not a weakly prime, because it can be changed into another prime (168768409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84384224 + 84384225.

It is an arithmetic number, because the mean of its divisors is an integer number (84384225).

Almost surely, 2^168768449 is an apocalyptic number.

It is an amenable number.

168768449 is a deficient number, since it is larger than the sum of its proper divisors (1).

168768449 is an equidigital number, since it uses as much as digits as its factorization.

168768449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 53.

The square root of 168768449 is about 12991.0911397003. The cubic root of 168768449 is about 552.6248623428.

The spelling of 168768449 in words is "one hundred sixty-eight million, seven hundred sixty-eight thousand, four hundred forty-nine".