68717920927 has 2 divisors, whose sum is σ = 68717920928. Its totient is φ = 68717920926.

The previous prime is 68717920907. The next prime is 68717920933. The reversal of 68717920927 is 72902971786.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68717920927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68717920907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34358960463 + 34358960464.

It is an arithmetic number, because the mean of its divisors is an integer number (34358960464).

Almost surely, 2^68717920927 is an apocalyptic number.

68717920927 is a deficient number, since it is larger than the sum of its proper divisors (1).

68717920927 is an equidigital number, since it uses as much as digits as its factorization.

68717920927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The spelling of 68717920927 in words is "sixty-eight billion, seven hundred seventeen million, nine hundred twenty thousand, nine hundred twenty-seven".