68746217993 has 2 divisors, whose sum is σ = 68746217994. Its totient is φ = 68746217992.

The previous prime is 68746217987. The next prime is 68746217999. The reversal of 68746217993 is 39971264786.

It is a balanced prime because it is at equal distance from previous prime (68746217987) and next prime (68746217999).

It can be written as a sum of positive squares in only one way, i.e., 62076719104 + 6669498889 = 249152^2 + 81667^2 .

It is a cyclic number.

It is not a de Polignac number, because 68746217993 - 2⁶ = 68746217929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68746217999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34373108996 + 34373108997.

It is an arithmetic number, because the mean of its divisors is an integer number (34373108997).

Almost surely, 2^68746217993 is an apocalyptic number.

It is an amenable number.

68746217993 is a deficient number, since it is larger than the sum of its proper divisors (1).

68746217993 is an equidigital number, since it uses as much as digits as its factorization.

68746217993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 62.

The spelling of 68746217993 in words is "sixty-eight billion, seven hundred forty-six million, two hundred seventeen thousand, nine hundred ninety-three".