68685163 has 2 divisors, whose sum is σ = 68685164. Its totient is φ = 68685162.

The previous prime is 68685161. The next prime is 68685179. The reversal of 68685163 is 36158686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68685163 - 2¹ = 68685161 is a prime.

Together with 68685161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68685161) 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, 34342581 + 34342582.

It is an arithmetic number, because the mean of its divisors is an integer number (34342582).

Almost surely, 2^68685163 is an apocalyptic number.

68685163 is a deficient number, since it is larger than the sum of its proper divisors (1).

68685163 is an equidigital number, since it uses as much as digits as its factorization.

68685163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 68685163 is about 8287.6512354225. The cubic root of 68685163 is about 409.5318133813.

It can be divided in two parts, 686 and 85163, that added together give a square (85849 = 293²).

The spelling of 68685163 in words is "sixty-eight million, six hundred eighty-five thousand, one hundred sixty-three".