197916398197 has 8 divisors (see below), whose sum is σ = 226193217152. Its totient is φ = 169640341200.

The previous prime is 197916398153. The next prime is 197916398311. The reversal of 197916398197 is 791893619791.

197916398197 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 197916398197 - 2¹¹ = 197916396149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197916398497) 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 7 ways as a sum of consecutive naturals, for example, 566872 + ... + 846862.

It is an arithmetic number, because the mean of its divisors is an integer number (28274152144).

Almost surely, 2^197916398197 is an apocalyptic number.

It is an amenable number.

197916398197 is a deficient number, since it is larger than the sum of its proper divisors (28276818955).

197916398197 is a wasteful number, since it uses less digits than its factorization.

197916398197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380979.

The product of its digits is 46294416, while the sum is 70.

The spelling of 197916398197 in words is "one hundred ninety-seven billion, nine hundred sixteen million, three hundred ninety-eight thousand, one hundred ninety-seven".