197198897 has 4 divisors (see below), whose sum is σ = 225370176. Its totient is φ = 169027620.

The previous prime is 197198893. The next prime is 197198917. The reversal of 197198897 is 798891791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197198897 - 2² = 197198893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197198893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14085629 + ... + 14085642.

It is an arithmetic number, because the mean of its divisors is an integer number (56342544).

Almost surely, 2^197198897 is an apocalyptic number.

It is an amenable number.

197198897 is a deficient number, since it is larger than the sum of its proper divisors (28171279).

197198897 is an equidigital number, since it uses as much as digits as its factorization.

197198897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28171278.

The product of its digits is 2286144, while the sum is 59.

The square root of 197198897 is about 14042.7524723610. The cubic root of 197198897 is about 582.0605434905.

The spelling of 197198897 in words is "one hundred ninety-seven million, one hundred ninety-eight thousand, eight hundred ninety-seven".