197997 has 8 divisors (see below), whose sum is σ = 272640. Its totient is φ = 127680.

The previous prime is 197971. The next prime is 198013. The reversal of 197997 is 799791.

197997 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 not a de Polignac number, because 197997 - 2⁶ = 197933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197927) 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, 972 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (34080).

2¹⁹⁷⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

197997 is a deficient number, since it is larger than the sum of its proper divisors (74643).

197997 is a wasteful number, since it uses less digits than its factorization.

197997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163.

The product of its digits is 35721, while the sum is 42.

The square root of 197997 is about 444.9685382137. The cubic root of 197997 is about 58.2844724635.

The spelling of 197997 in words is "one hundred ninety-seven thousand, nine hundred ninety-seven".