68445197 has 2 divisors, whose sum is σ = 68445198. Its totient is φ = 68445196.

The previous prime is 68445193. The next prime is 68445229. The reversal of 68445197 is 79154486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63904036 + 4541161 = 7994^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 68445197 - 2² = 68445193 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 (68445193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34222598 + 34222599.

It is an arithmetic number, because the mean of its divisors is an integer number (34222599).

Almost surely, 2^68445197 is an apocalyptic number.

It is an amenable number.

68445197 is a deficient number, since it is larger than the sum of its proper divisors (1).

68445197 is an equidigital number, since it uses as much as digits as its factorization.

68445197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 68445197 is about 8273.1612458600. The cubic root of 68445197 is about 409.0543285016.

The spelling of 68445197 in words is "sixty-eight million, four hundred forty-five thousand, one hundred ninety-seven".