206828513 has 2 divisors, whose sum is σ = 206828514. Its totient is φ = 206828512.

The previous prime is 206828441. The next prime is 206828537. The reversal of 206828513 is 315828602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188018944 + 18809569 = 13712^2 + 4337^2 .

It is a cyclic number.

It is not a de Polignac number, because 206828513 - 2¹² = 206824417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206828543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103414256 + 103414257.

It is an arithmetic number, because the mean of its divisors is an integer number (103414257).

Almost surely, 2^206828513 is an apocalyptic number.

It is an amenable number.

206828513 is a deficient number, since it is larger than the sum of its proper divisors (1).

206828513 is an equidigital number, since it uses as much as digits as its factorization.

206828513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 206828513 is about 14381.5337499169. The cubic root of 206828513 is about 591.3847708606.

The spelling of 206828513 in words is "two hundred six million, eight hundred twenty-eight thousand, five hundred thirteen".