206206394 has 4 divisors (see below), whose sum is σ = 309309594. Its totient is φ = 103103196.

The previous prime is 206206391. The next prime is 206206417. The reversal of 206206394 is 493602602.

206206394 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 204118369 + 2088025 = 14287^2 + 1445^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206206394.

It is not an unprimeable number, because it can be changed into a prime (206206391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51551597 + ... + 51551600.

Almost surely, 2^206206394 is an apocalyptic number.

206206394 is a deficient number, since it is larger than the sum of its proper divisors (103103200).

206206394 is a wasteful number, since it uses less digits than its factorization.

206206394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103103199.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 206206394 is about 14359.8883700397. Note that the first 3 decimals coincide. The cubic root of 206206394 is about 590.7912337400.

Adding to 206206394 its reverse (493602602), we get a palindrome (699808996).

The spelling of 206206394 in words is "two hundred six million, two hundred six thousand, three hundred ninety-four".