68085181 has 2 divisors, whose sum is σ = 68085182. Its totient is φ = 68085180.

The previous prime is 68085169. The next prime is 68085191. The reversal of 68085181 is 18158086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 9424900 = 7659^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 68085181 - 2¹¹ = 68083133 is a prime.

It is a super-2 number, since 2×68085181² = 9271183743605522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68085181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68085131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34042590 + 34042591.

It is an arithmetic number, because the mean of its divisors is an integer number (34042591).

Almost surely, 2^68085181 is an apocalyptic number.

It is an amenable number.

68085181 is a deficient number, since it is larger than the sum of its proper divisors (1).

68085181 is an equidigital number, since it uses as much as digits as its factorization.

68085181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 68085181 is about 8251.3744915620. The cubic root of 68085181 is about 408.3358701865.

The spelling of 68085181 in words is "sixty-eight million, eighty-five thousand, one hundred eighty-one".