206390853 has 6 divisors (see below), whose sum is σ = 298120134. Its totient is φ = 137593896.

The previous prime is 206390809. The next prime is 206390857. The reversal of 206390853 is 358093602.

It can be written as a sum of positive squares in only one way, i.e., 147914244 + 58476609 = 12162^2 + 7647^2 .

It is not a de Polignac number, because 206390853 - 2⁹ = 206390341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206390857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11466150 + ... + 11466167.

It is an arithmetic number, because the mean of its divisors is an integer number (49686689).

Almost surely, 2^206390853 is an apocalyptic number.

It is an amenable number.

206390853 is a deficient number, since it is larger than the sum of its proper divisors (91729281).

206390853 is a wasteful number, since it uses less digits than its factorization.

206390853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22932323 (or 22932320 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 206390853 is about 14366.3096514032. The cubic root of 206390853 is about 590.9673425400.

The spelling of 206390853 in words is "two hundred six million, three hundred ninety thousand, eight hundred fifty-three".