205942339 has 4 divisors (see below), whose sum is σ = 208423656. Its totient is φ = 203461024.

The previous prime is 205942327. The next prime is 205942357. The reversal of 205942339 is 933249502.

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

It is a cyclic number.

It is not a de Polignac number, because 205942339 - 2⁵ = 205942307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205942298 and 205942307.

It is not an unprimeable number, because it can be changed into a prime (205942309) 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, 1240534 + ... + 1240699.

It is an arithmetic number, because the mean of its divisors is an integer number (52105914).

Almost surely, 2^205942339 is an apocalyptic number.

205942339 is a deficient number, since it is larger than the sum of its proper divisors (2481317).

205942339 is an equidigital number, since it uses as much as digits as its factorization.

205942339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481316.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 205942339 is about 14350.6912377070. The cubic root of 205942339 is about 590.5389492656.

The spelling of 205942339 in words is "two hundred five million, nine hundred forty-two thousand, three hundred thirty-nine".