197897 has 8 divisors (see below), whose sum is σ = 239616. Its totient is φ = 159552.

The previous prime is 197893. The next prime is 197909. The reversal of 197897 is 798791.

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 197897 - 2² = 197893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197891) 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, 713 + ... + 950.

It is an arithmetic number, because the mean of its divisors is an integer number (29952).

2¹⁹⁷⁸⁹⁷ is an apocalyptic number.

197897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

197897 is a deficient number, since it is larger than the sum of its proper divisors (41719).

197897 is a wasteful number, since it uses less digits than its factorization.

197897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687.

The product of its digits is 31752, while the sum is 41.

The square root of 197897 is about 444.8561565270. The cubic root of 197897 is about 58.2746584617.

The spelling of 197897 in words is "one hundred ninety-seven thousand, eight hundred ninety-seven".