197973 has 6 divisors (see below), whose sum is σ = 285974. Its totient is φ = 131976.

The previous prime is 197971. The next prime is 198013. The reversal of 197973 is 379791.

197973 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 178929 + 19044 = 423^2 + 138^2 .

It is not a de Polignac number, because 197973 - 2¹ = 197971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10990 + ... + 11007.

2¹⁹⁷⁹⁷³ is an apocalyptic number.

It is an amenable number.

197973 is a deficient number, since it is larger than the sum of its proper divisors (88001).

197973 is a wasteful number, since it uses less digits than its factorization.

197973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22003 (or 22000 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 197973 is about 444.9415691976. The cubic root of 197973 is about 58.2821174045.

The spelling of 197973 in words is "one hundred ninety-seven thousand, nine hundred seventy-three".