97259197817 has 2 divisors, whose sum is σ = 97259197818. Its totient is φ = 97259197816.

The previous prime is 97259197771. The next prime is 97259197843. The reversal of 97259197817 is 71879195279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91745986816 + 5513211001 = 302896^2 + 74251^2 .

It is a cyclic number.

It is not a de Polignac number, because 97259197817 - 2⁶ = 97259197753 is a prime.

It is not a weakly prime, because it can be changed into another prime (97259197877) 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, 48629598908 + 48629598909.

It is an arithmetic number, because the mean of its divisors is an integer number (48629598909).

Almost surely, 2^97259197817 is an apocalyptic number.

It is an amenable number.

97259197817 is a deficient number, since it is larger than the sum of its proper divisors (1).

97259197817 is an equidigital number, since it uses as much as digits as its factorization.

97259197817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 65.

The spelling of 97259197817 in words is "ninety-seven billion, two hundred fifty-nine million, one hundred ninety-seven thousand, eight hundred seventeen".