97798196449 has 2 divisors, whose sum is σ = 97798196450. Its totient is φ = 97798196448.

The previous prime is 97798196369. The next prime is 97798196471. The reversal of 97798196449 is 94469189779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64224230625 + 33573965824 = 253425^2 + 183232^2 .

It is a cyclic number.

It is not a de Polignac number, because 97798196449 - 2¹¹ = 97798194401 is a prime.

It is a super-3 number, since 3×97798196449³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (97798199449) 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, 48899098224 + 48899098225.

It is an arithmetic number, because the mean of its divisors is an integer number (48899098225).

Almost surely, 2^97798196449 is an apocalyptic number.

It is an amenable number.

97798196449 is a deficient number, since it is larger than the sum of its proper divisors (1).

97798196449 is an equidigital number, since it uses as much as digits as its factorization.

97798196449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246903552, while the sum is 73.

The spelling of 97798196449 in words is "ninety-seven billion, seven hundred ninety-eight million, one hundred ninety-six thousand, four hundred forty-nine".