191197 has 8 divisors (see below), whose sum is σ = 208800. Its totient is φ = 174384.

The previous prime is 191189. The next prime is 191227. The reversal of 191197 is 791191.

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 191197 - 2³ = 191189 is a prime.

191197 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191137) 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, 378 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (26100).

2¹⁹¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

191197 is a deficient number, since it is larger than the sum of its proper divisors (17603).

191197 is a wasteful number, since it uses less digits than its factorization.

191197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its digits is 567, while the sum is 28.

The square root of 191197 is about 437.2607917479. The cubic root of 191197 is about 57.6094449854.

The spelling of 191197 in words is "one hundred ninety-one thousand, one hundred ninety-seven".