68738161 has 2 divisors, whose sum is σ = 68738162. Its totient is φ = 68738160.

The previous prime is 68738113. The next prime is 68738203. The reversal of 68738161 is 16183786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 8520561 = 7760^2 + 2919^2 .

It is a cyclic number.

It is not a de Polignac number, because 68738161 - 2¹¹ = 68736113 is a prime.

It is not a weakly prime, because it can be changed into another prime (68738861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369080 + 34369081.

It is an arithmetic number, because the mean of its divisors is an integer number (34369081).

Almost surely, 2^68738161 is an apocalyptic number.

It is an amenable number.

68738161 is a deficient number, since it is larger than the sum of its proper divisors (1).

68738161 is an equidigital number, since it uses as much as digits as its factorization.

68738161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 68738161 is about 8290.8480265893. The cubic root of 68738161 is about 409.6371189334.

The spelling of 68738161 in words is "sixty-eight million, seven hundred thirty-eight thousand, one hundred sixty-one".