205066839 has 16 divisors (see below), whose sum is σ = 282853760. Its totient is φ = 132049440.

The previous prime is 205066837. The next prime is 205066847. The reversal of 205066839 is 938660502.

It is not a de Polignac number, because 205066839 - 2¹ = 205066837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205066797 and 205066806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205066837) 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 15 ways as a sum of consecutive naturals, for example, 8784 + ... + 22074.

It is an arithmetic number, because the mean of its divisors is an integer number (17678360).

Almost surely, 2^205066839 is an apocalyptic number.

205066839 is a deficient number, since it is larger than the sum of its proper divisors (77786921).

205066839 is a wasteful number, since it uses less digits than its factorization.

205066839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13470.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 205066839 is about 14320.1549921780. The cubic root of 205066839 is about 589.7009295340.

The spelling of 205066839 in words is "two hundred five million, sixty-six thousand, eight hundred thirty-nine".