68278211 has 2 divisors, whose sum is σ = 68278212. Its totient is φ = 68278210.

The previous prime is 68278157. The next prime is 68278247. The reversal of 68278211 is 11287286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68278211 - 2²² = 64083907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68278271) 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, 34139105 + 34139106.

It is an arithmetic number, because the mean of its divisors is an integer number (34139106).

Almost surely, 2^68278211 is an apocalyptic number.

68278211 is a deficient number, since it is larger than the sum of its proper divisors (1).

68278211 is an equidigital number, since it uses as much as digits as its factorization.

68278211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 68278211 is about 8263.0630519197. The cubic root of 68278211 is about 408.7214004872.

The spelling of 68278211 in words is "sixty-eight million, two hundred seventy-eight thousand, two hundred eleven".