68816647 has 2 divisors, whose sum is σ = 68816648. Its totient is φ = 68816646.

The previous prime is 68816609. The next prime is 68816687. The reversal of 68816647 is 74661886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68816647 - 2⁷ = 68816519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68816597 and 68816606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68816687) 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, 34408323 + 34408324.

It is an arithmetic number, because the mean of its divisors is an integer number (34408324).

Almost surely, 2^68816647 is an apocalyptic number.

68816647 is a deficient number, since it is larger than the sum of its proper divisors (1).

68816647 is an equidigital number, since it uses as much as digits as its factorization.

68816647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 68816647 is about 8295.5799676695. The cubic root of 68816647 is about 409.7929690439.

The spelling of 68816647 in words is "sixty-eight million, eight hundred sixteen thousand, six hundred forty-seven".