68189717 has 2 divisors, whose sum is σ = 68189718. Its totient is φ = 68189716.

The previous prime is 68189713. The next prime is 68189731. The reversal of 68189717 is 71798186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 3129361 = 8066^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 68189717 - 2² = 68189713 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68189711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34094858 + 34094859.

It is an arithmetic number, because the mean of its divisors is an integer number (34094859).

Almost surely, 2^68189717 is an apocalyptic number.

It is an amenable number.

68189717 is a deficient number, since it is larger than the sum of its proper divisors (1).

68189717 is an equidigital number, since it uses as much as digits as its factorization.

68189717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 47.

The square root of 68189717 is about 8257.7065217892. The cubic root of 68189717 is about 408.5447456487.

The spelling of 68189717 in words is "sixty-eight million, one hundred eighty-nine thousand, seven hundred seventeen".