197668415797 has 2 divisors, whose sum is σ = 197668415798. Its totient is φ = 197668415796.

The previous prime is 197668415771. The next prime is 197668415809. The reversal of 197668415797 is 797514866791.

197668415797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192796515396 + 4871900401 = 439086^2 + 69799^2 .

It is a cyclic number.

It is not a de Polignac number, because 197668415797 - 2¹¹ = 197668413749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197668415897) 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, 98834207898 + 98834207899.

It is an arithmetic number, because the mean of its divisors is an integer number (98834207899).

Almost surely, 2^197668415797 is an apocalyptic number.

It is an amenable number.

197668415797 is a deficient number, since it is larger than the sum of its proper divisors (1).

197668415797 is an equidigital number, since it uses as much as digits as its factorization.

197668415797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160030080, while the sum is 70.

The spelling of 197668415797 in words is "one hundred ninety-seven billion, six hundred sixty-eight million, four hundred fifteen thousand, seven hundred ninety-seven".