206338197 has 24 divisors (see below), whose sum is σ = 314751136. Its totient is φ = 119501568.

The previous prime is 206338193. The next prime is 206338207. The reversal of 206338197 is 791833602.

It is not a de Polignac number, because 206338197 - 2² = 206338193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206338193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2118 + ... + 20424.

Almost surely, 2^206338197 is an apocalyptic number.

It is an amenable number.

206338197 is a deficient number, since it is larger than the sum of its proper divisors (108412939).

206338197 is a wasteful number, since it uses less digits than its factorization.

206338197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18357 (or 18340 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 206338197 is about 14364.4769135531. The cubic root of 206338197 is about 590.9170809083.

The spelling of 206338197 in words is "two hundred six million, three hundred thirty-eight thousand, one hundred ninety-seven".