197697 has 4 divisors (see below), whose sum is σ = 263600. Its totient is φ = 131796.

The previous prime is 197689. The next prime is 197699. The reversal of 197697 is 796791.

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 not a de Polignac number, because 197697 - 2³ = 197689 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32947 + ... + 32952.

It is an arithmetic number, because the mean of its divisors is an integer number (65900).

2¹⁹⁷⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

197697 is a deficient number, since it is larger than the sum of its proper divisors (65903).

197697 is an equidigital number, since it uses as much as digits as its factorization.

197697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65902.

The product of its digits is 23814, while the sum is 39.

The square root of 197697 is about 444.6313079395. The cubic root of 197697 is about 58.2550205353.

The spelling of 197697 in words is "one hundred ninety-seven thousand, six hundred ninety-seven".