168912049 has 2 divisors, whose sum is σ = 168912050. Its totient is φ = 168912048.

The previous prime is 168912011. The next prime is 168912077. The reversal of 168912049 is 940219861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168480400 + 431649 = 12980^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 168912049 - 2¹⁵ = 168879281 is a prime.

It is not a weakly prime, because it can be changed into another prime (168912089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84456024 + 84456025.

It is an arithmetic number, because the mean of its divisors is an integer number (84456025).

Almost surely, 2^168912049 is an apocalyptic number.

It is an amenable number.

168912049 is a deficient number, since it is larger than the sum of its proper divisors (1).

168912049 is an equidigital number, since it uses as much as digits as its factorization.

168912049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 168912049 is about 12996.6168290059. The cubic root of 168912049 is about 552.7815552039.

The spelling of 168912049 in words is "one hundred sixty-eight million, nine hundred twelve thousand, forty-nine".