195609797 has 2 divisors, whose sum is σ = 195609798. Its totient is φ = 195609796.

The previous prime is 195609793. The next prime is 195609809. The reversal of 195609797 is 797906591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170198116 + 25411681 = 13046^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 195609797 - 2² = 195609793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195609793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97804898 + 97804899.

It is an arithmetic number, because the mean of its divisors is an integer number (97804899).

Almost surely, 2^195609797 is an apocalyptic number.

It is an amenable number.

195609797 is a deficient number, since it is larger than the sum of its proper divisors (1).

195609797 is an equidigital number, since it uses as much as digits as its factorization.

195609797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The square root of 195609797 is about 13986.0572356901. The cubic root of 195609797 is about 580.4928401202.

The spelling of 195609797 in words is "one hundred ninety-five million, six hundred nine thousand, seven hundred ninety-seven".