68205679 has 2 divisors, whose sum is σ = 68205680. Its totient is φ = 68205678.

The previous prime is 68205637. The next prime is 68205691. The reversal of 68205679 is 97650286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68205679 - 2¹¹ = 68203631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68205619) 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, 34102839 + 34102840.

It is an arithmetic number, because the mean of its divisors is an integer number (34102840).

Almost surely, 2^68205679 is an apocalyptic number.

68205679 is a deficient number, since it is larger than the sum of its proper divisors (1).

68205679 is an equidigital number, since it uses as much as digits as its factorization.

68205679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 68205679 is about 8258.6729563532. The cubic root of 68205679 is about 408.5766208481.

The spelling of 68205679 in words is "sixty-eight million, two hundred five thousand, six hundred seventy-nine".