197172 has 18 divisors (see below), whose sum is σ = 498498. Its totient is φ = 65712.

The previous prime is 197161. The next prime is 197203. The reversal of 197172 is 271791.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 36 = 444^2 + 6^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

197172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2703 + ... + 2774.

2¹⁹⁷¹⁷² is an apocalyptic number.

197172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

197172 is an abundant number, since it is smaller than the sum of its proper divisors (301326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197172 is a wasteful number, since it uses less digits than its factorization.

197172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487 (or 5482 counting only the distinct ones).

The product of its digits is 882, while the sum is 27.

The square root of 197172 is about 444.0405386899. The cubic root of 197172 is about 58.2034078849.

The spelling of 197172 in words is "one hundred ninety-seven thousand, one hundred seventy-two".