197945 has 16 divisors (see below), whose sum is σ = 267840. Its totient is φ = 139200.

The previous prime is 197933. The next prime is 197947. The reversal of 197945 is 549791.

It is not a de Polignac number, because 197945 - 2⁸ = 197689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3215 + ... + 3275.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2¹⁹⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

197945 is a deficient number, since it is larger than the sum of its proper divisors (69895).

197945 is a wasteful number, since it uses less digits than its factorization.

197945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136.

The product of its digits is 11340, while the sum is 35.

The square root of 197945 is about 444.9101032793. The cubic root of 197945 is about 58.2793695951.

The spelling of 197945 in words is "one hundred ninety-seven thousand, nine hundred forty-five".