68985811 has 2 divisors, whose sum is σ = 68985812. Its totient is φ = 68985810.

The previous prime is 68985793. The next prime is 68985823. The reversal of 68985811 is 11858986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68985811 - 2⁹ = 68985299 is a prime.

It is not a weakly prime, because it can be changed into another prime (68985841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34492905 + 34492906.

It is an arithmetic number, because the mean of its divisors is an integer number (34492906).

Almost surely, 2^68985811 is an apocalyptic number.

68985811 is a deficient number, since it is larger than the sum of its proper divisors (1).

68985811 is an equidigital number, since it uses as much as digits as its factorization.

68985811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 46.

The square root of 68985811 is about 8305.7697415712. The cubic root of 68985811 is about 410.1284764926.

It can be divided in two parts, 68985 and 811, that added together give a palindrome (69796).

The spelling of 68985811 in words is "sixty-eight million, nine hundred eighty-five thousand, eight hundred eleven".