197109195 has 16 divisors (see below), whose sum is σ = 329087232. Its totient is φ = 100554080.

The previous prime is 197109193. The next prime is 197109229. The reversal of 197109195 is 591901791.

It is a happy number.

It is not a de Polignac number, because 197109195 - 2¹ = 197109193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197109193) 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 in 15 ways as a sum of consecutive naturals, for example, 285321 + ... + 286010.

It is an arithmetic number, because the mean of its divisors is an integer number (20567952).

Almost surely, 2^197109195 is an apocalyptic number.

197109195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

197109195 is a deficient number, since it is larger than the sum of its proper divisors (131978037).

197109195 is a wasteful number, since it uses less digits than its factorization.

197109195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571362.

The product of its (nonzero) digits is 25515, while the sum is 42.

The square root of 197109195 is about 14039.5582195452. The cubic root of 197109195 is about 581.9722740420.

The spelling of 197109195 in words is "one hundred ninety-seven million, one hundred nine thousand, one hundred ninety-five".