19869123296497 has 2 divisors, whose sum is σ = 19869123296498. Its totient is φ = 19869123296496.

The previous prime is 19869123296471. The next prime is 19869123296509. The reversal of 19869123296497 is 79469232196891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14194741943281 + 5674381353216 = 3767591^2 + 2382096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19869123296497 is a prime.

It is not a weakly prime, because it can be changed into another prime (19869123291497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9934561648248 + 9934561648249.

It is an arithmetic number, because the mean of its divisors is an integer number (9934561648249).

Almost surely, 2^{19869123296497} is an apocalyptic number.

It is an amenable number.

19869123296497 is a deficient number, since it is larger than the sum of its proper divisors (1).

19869123296497 is an equidigital number, since it uses as much as digits as its factorization.

19869123296497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 634894848, while the sum is 76.

The spelling of 19869123296497 in words is "nineteen trillion, eight hundred sixty-nine billion, one hundred twenty-three million, two hundred ninety-six thousand, four hundred ninety-seven".