205979339 has 2 divisors, whose sum is σ = 205979340. Its totient is φ = 205979338.

The previous prime is 205979311. The next prime is 205979341. The reversal of 205979339 is 933979502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205979339 - 2¹² = 205975243 is a prime.

Together with 205979341, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205979293 and 205979302.

It is not a weakly prime, because it can be changed into another prime (205979369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102989669 + 102989670.

It is an arithmetic number, because the mean of its divisors is an integer number (102989670).

Almost surely, 2^205979339 is an apocalyptic number.

205979339 is a deficient number, since it is larger than the sum of its proper divisors (1).

205979339 is an equidigital number, since it uses as much as digits as its factorization.

205979339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 459270, while the sum is 47.

The square root of 205979339 is about 14351.9803163187. The cubic root of 205979339 is about 590.5743129388.

The spelling of 205979339 in words is "two hundred five million, nine hundred seventy-nine thousand, three hundred thirty-nine".