168922213 has 2 divisors, whose sum is σ = 168922214. Its totient is φ = 168922212.

The previous prime is 168922211. The next prime is 168922241. The reversal of 168922213 is 312229861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145515969 + 23406244 = 12063^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 168922213 - 2¹ = 168922211 is a prime.

Together with 168922211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168922211) 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, 84461106 + 84461107.

It is an arithmetic number, because the mean of its divisors is an integer number (84461107).

Almost surely, 2^168922213 is an apocalyptic number.

It is an amenable number.

168922213 is a deficient number, since it is larger than the sum of its proper divisors (1).

168922213 is an equidigital number, since it uses as much as digits as its factorization.

168922213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 168922213 is about 12997.0078479625. The cubic root of 168922213 is about 552.7926425500.

The spelling of 168922213 in words is "one hundred sixty-eight million, nine hundred twenty-two thousand, two hundred thirteen".