197992 has 8 divisors (see below), whose sum is σ = 371250. Its totient is φ = 98992.

The previous prime is 197971. The next prime is 198013. The reversal of 197992 is 299791.

It is an interprime number because it is at equal distance from previous prime (197971) and next prime (198013).

It can be written as a sum of positive squares in only one way, i.e., 111556 + 86436 = 334^2 + 294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

197992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12367 + ... + 12382.

2¹⁹⁷⁹⁹² is an apocalyptic number.

It is an amenable number.

197992 is a deficient number, since it is larger than the sum of its proper divisors (173258).

197992 is a wasteful number, since it uses less digits than its factorization.

197992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24755 (or 24751 counting only the distinct ones).

The product of its digits is 10206, while the sum is 37.

The square root of 197992 is about 444.9629198034. The cubic root of 197992 is about 58.2839818419.

The spelling of 197992 in words is "one hundred ninety-seven thousand, nine hundred ninety-two".