195128197 has 8 divisors (see below), whose sum is σ = 215784000. Its totient is φ = 174958560.

The previous prime is 195128191. The next prime is 195128201. The reversal of 195128197 is 791821591.

195128197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195128197 - 2³ = 195128189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195128191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120697 + ... + 122302.

It is an arithmetic number, because the mean of its divisors is an integer number (26973000).

Almost surely, 2^195128197 is an apocalyptic number.

It is an amenable number.

195128197 is a deficient number, since it is larger than the sum of its proper divisors (20655803).

195128197 is a wasteful number, since it uses less digits than its factorization.

195128197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243083.

The product of its digits is 45360, while the sum is 43.

The square root of 195128197 is about 13968.8294785211. The cubic root of 195128197 is about 580.0160489019.

The spelling of 195128197 in words is "one hundred ninety-five million, one hundred twenty-eight thousand, one hundred ninety-seven".