68755691 has 2 divisors, whose sum is σ = 68755692. Its totient is φ = 68755690.

The previous prime is 68755669. The next prime is 68755703. The reversal of 68755691 is 19655786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68755691 - 2⁶ = 68755627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68755891) 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, 34377845 + 34377846.

It is an arithmetic number, because the mean of its divisors is an integer number (34377846).

Almost surely, 2^68755691 is an apocalyptic number.

68755691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68755691 is an equidigital number, since it uses as much as digits as its factorization.

68755691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 47.

The square root of 68755691 is about 8291.9051489992. The cubic root of 68755691 is about 409.6719386426.

The spelling of 68755691 in words is "sixty-eight million, seven hundred fifty-five thousand, six hundred ninety-one".