206768539 has 4 divisors (see below), whose sum is σ = 207262440. Its totient is φ = 206274640.

The previous prime is 206768537. The next prime is 206768581. The reversal of 206768539 is 935867602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935867602 = 2 ⋅467933801.

It is a cyclic number.

It is not a de Polignac number, because 206768539 - 2¹ = 206768537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206768533) 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 3 ways as a sum of consecutive naturals, for example, 246322 + ... + 247159.

It is an arithmetic number, because the mean of its divisors is an integer number (51815610).

Almost surely, 2^206768539 is an apocalyptic number.

206768539 is a deficient number, since it is larger than the sum of its proper divisors (493901).

206768539 is an equidigital number, since it uses as much as digits as its factorization.

206768539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493900.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 206768539 is about 14379.4484942921. The cubic root of 206768539 is about 591.3276041149.

The spelling of 206768539 in words is "two hundred six million, seven hundred sixty-eight thousand, five hundred thirty-nine".