168211853 has 2 divisors, whose sum is σ = 168211854. Its totient is φ = 168211852.

The previous prime is 168211843. The next prime is 168211873. The reversal of 168211853 is 358112861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155800324 + 12411529 = 12482^2 + 3523^2 .

It is an emirp because it is prime and its reverse (358112861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168211853 - 2⁶ = 168211789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168211843) 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, 84105926 + 84105927.

It is an arithmetic number, because the mean of its divisors is an integer number (84105927).

Almost surely, 2^168211853 is an apocalyptic number.

It is an amenable number.

168211853 is a deficient number, since it is larger than the sum of its proper divisors (1).

168211853 is an equidigital number, since it uses as much as digits as its factorization.

168211853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 168211853 is about 12969.6512289267. The cubic root of 168211853 is about 552.0166768836.

The spelling of 168211853 in words is "one hundred sixty-eight million, two hundred eleven thousand, eight hundred fifty-three".