197397 has 10 divisors (see below), whose sum is σ = 294998. Its totient is φ = 131544.

The previous prime is 197389. The next prime is 197419. The reversal of 197397 is 793791.

It can be written as a sum of positive squares in only one way, i.e., 194481 + 2916 = 441^2 + 54^2 .

It is not a de Polignac number, because 197397 - 2³ = 197389 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197347) by changing a digit.

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 in 9 ways as a sum of consecutive naturals, for example, 1138 + ... + 1299.

2¹⁹⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

197397 is a deficient number, since it is larger than the sum of its proper divisors (97601).

197397 is an equidigital number, since it uses as much as digits as its factorization.

197397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2440 counting only the distinct ones).

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

The square root of 197397 is about 444.2938216991. The cubic root of 197397 is about 58.2255387970.

The spelling of 197397 in words is "one hundred ninety-seven thousand, three hundred ninety-seven".