195170897 has 4 divisors (see below), whose sum is σ = 206651556. Its totient is φ = 183690240.

The previous prime is 195170891. The next prime is 195170909. The reversal of 195170897 is 798071591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798071591 = 107 ⋅7458613.

It can be written as a sum of positive squares in 2 ways, for example, as 125798656 + 69372241 = 11216^2 + 8329^2 .

It is a cyclic number.

It is not a de Polignac number, because 195170897 - 2¹⁰ = 195169873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195170891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5740304 + ... + 5740337.

It is an arithmetic number, because the mean of its divisors is an integer number (51662889).

Almost surely, 2^195170897 is an apocalyptic number.

195170897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

195170897 is a deficient number, since it is larger than the sum of its proper divisors (11480659).

195170897 is a wasteful number, since it uses less digits than its factorization.

195170897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11480658.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 195170897 is about 13970.3577978519. The cubic root of 195170897 is about 580.0583542159.

The spelling of 195170897 in words is "one hundred ninety-five million, one hundred seventy thousand, eight hundred ninety-seven".