205240093 has 2 divisors, whose sum is σ = 205240094. Its totient is φ = 205240092.

The previous prime is 205240067. The next prime is 205240121. The reversal of 205240093 is 390042502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205119684 + 120409 = 14322^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 205240093 - 2⁹ = 205239581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205247093) 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, 102620046 + 102620047.

It is an arithmetic number, because the mean of its divisors is an integer number (102620047).

Almost surely, 2^205240093 is an apocalyptic number.

It is an amenable number.

205240093 is a deficient number, since it is larger than the sum of its proper divisors (1).

205240093 is an equidigital number, since it uses as much as digits as its factorization.

205240093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 205240093 is about 14326.2030210381. The cubic root of 205240093 is about 589.8669555414.

Adding to 205240093 its reverse (390042502), we get a palindrome (595282595).

The spelling of 205240093 in words is "two hundred five million, two hundred forty thousand, ninety-three".