197738197 has 4 divisors (see below), whose sum is σ = 197925280. Its totient is φ = 197551116.

The previous prime is 197738179. The next prime is 197738213. The reversal of 197738197 is 791837791.

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 a de Polignac number, because none of the positive numbers 2^k-197738197 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 (197738147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91947 + ... + 94072.

It is an arithmetic number, because the mean of its divisors is an integer number (49481320).

Almost surely, 2^197738197 is an apocalyptic number.

It is an amenable number.

197738197 is a deficient number, since it is larger than the sum of its proper divisors (187083).

197738197 is a wasteful number, since it uses less digits than its factorization.

197738197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187082.

The product of its digits is 666792, while the sum is 52.

The square root of 197738197 is about 14061.9414377958. The cubic root of 197738197 is about 582.5906673630.

The spelling of 197738197 in words is "one hundred ninety-seven million, seven hundred thirty-eight thousand, one hundred ninety-seven".