68338321 has 2 divisors, whose sum is σ = 68338322. Its totient is φ = 68338320.

The previous prime is 68338301. The next prime is 68338327. The reversal of 68338321 is 12383386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 6558721 = 7860^2 + 2561^2 .

It is a cyclic number.

It is not a de Polignac number, because 68338321 - 2⁹ = 68337809 is a prime.

It is a super-2 number, since 2×68338321² = 9340252234198082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68338327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34169160 + 34169161.

It is an arithmetic number, because the mean of its divisors is an integer number (34169161).

Almost surely, 2^68338321 is an apocalyptic number.

It is an amenable number.

68338321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68338321 is an equidigital number, since it uses as much as digits as its factorization.

68338321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 68338321 is about 8266.6995227842. The cubic root of 68338321 is about 408.8413071497.

The spelling of 68338321 in words is "sixty-eight million, three hundred thirty-eight thousand, three hundred twenty-one".