68517311 has 2 divisors, whose sum is σ = 68517312. Its totient is φ = 68517310.

The previous prime is 68517283. The next prime is 68517341. The reversal of 68517311 is 11371586.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68517311 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 (68517341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34258655 + 34258656.

It is an arithmetic number, because the mean of its divisors is an integer number (34258656).

Almost surely, 2^68517311 is an apocalyptic number.

68517311 is a deficient number, since it is larger than the sum of its proper divisors (1).

68517311 is an equidigital number, since it uses as much as digits as its factorization.

68517311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 68517311 is about 8277.5184083154. The cubic root of 68517311 is about 409.1979382375.

Adding to 68517311 its reverse (11371586), we get a palindrome (79888897).

It can be divided in two parts, 685173 and 11, that multiplied together give a triangular number (7536903 = T₃₈₈₂).

The spelling of 68517311 in words is "sixty-eight million, five hundred seventeen thousand, three hundred eleven".