68358221 has 2 divisors, whose sum is σ = 68358222. Its totient is φ = 68358220.

The previous prime is 68358217. The next prime is 68358233. The reversal of 68358221 is 12285386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45414121 + 22944100 = 6739^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 68358221 - 2² = 68358217 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68358421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34179110 + 34179111.

It is an arithmetic number, because the mean of its divisors is an integer number (34179111).

Almost surely, 2^68358221 is an apocalyptic number.

It is an amenable number.

68358221 is a deficient number, since it is larger than the sum of its proper divisors (1).

68358221 is an equidigital number, since it uses as much as digits as its factorization.

68358221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 68358221 is about 8267.9030594220. The cubic root of 68358221 is about 408.8809879237.

The spelling of 68358221 in words is "sixty-eight million, three hundred fifty-eight thousand, two hundred twenty-one".