168620213 has 2 divisors, whose sum is σ = 168620214. Its totient is φ = 168620212.

The previous prime is 168620209. The next prime is 168620233. The reversal of 168620213 is 312026861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98446084 + 70174129 = 9922^2 + 8377^2 .

It is a cyclic number.

It is not a de Polignac number, because 168620213 - 2² = 168620209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168620203) 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, 84310106 + 84310107.

It is an arithmetic number, because the mean of its divisors is an integer number (84310107).

Almost surely, 2^168620213 is an apocalyptic number.

It is an amenable number.

168620213 is a deficient number, since it is larger than the sum of its proper divisors (1).

168620213 is an equidigital number, since it uses as much as digits as its factorization.

168620213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 168620213 is about 12985.3845919172. The cubic root of 168620213 is about 552.4630175283.

The spelling of 168620213 in words is "one hundred sixty-eight million, six hundred twenty thousand, two hundred thirteen".