9999939810697 has 2 divisors, whose sum is σ = 9999939810698. Its totient is φ = 9999939810696.

The previous prime is 9999939810691. The next prime is 9999939810743. The reversal of 9999939810697 is 7960189399999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5162033984121 + 4837905826576 = 2272011^2 + 2199524^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999939810697 - 2⁷ = 9999939810569 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999939810691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999969905348 + 4999969905349.

It is an arithmetic number, because the mean of its divisors is an integer number (4999969905349).

Almost surely, 2^{9999939810697} is an apocalyptic number.

It is an amenable number.

9999939810697 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999939810697 is an equidigital number, since it uses as much as digits as its factorization.

9999939810697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4821232752, while the sum is 88.

The spelling of 9999939810697 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred thirty-nine million, eight hundred ten thousand, six hundred ninety-seven".