168610213 has 2 divisors, whose sum is σ = 168610214. Its totient is φ = 168610212.

The previous prime is 168610187. The next prime is 168610241. The reversal of 168610213 is 312016861.

It is an a-pointer prime, because the next prime (168610241) can be obtained adding 168610213 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164275489 + 4334724 = 12817^2 + 2082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168610213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168613213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84305106 + 84305107.

It is an arithmetic number, because the mean of its divisors is an integer number (84305107).

Almost surely, 2^168610213 is an apocalyptic number.

It is an amenable number.

168610213 is a deficient number, since it is larger than the sum of its proper divisors (1).

168610213 is an equidigital number, since it uses as much as digits as its factorization.

168610213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 168610213 is about 12984.9995379284. Note that the first 3 decimals coincide. The cubic root of 168610213 is about 552.4520960630.

The spelling of 168610213 in words is "one hundred sixty-eight million, six hundred ten thousand, two hundred thirteen".