205329191 has 2 divisors, whose sum is σ = 205329192. Its totient is φ = 205329190.

The previous prime is 205329167. The next prime is 205329197. The reversal of 205329191 is 191923502.

205329191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205329191 - 2¹⁸ = 205067047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205329197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102664595 + 102664596.

It is an arithmetic number, because the mean of its divisors is an integer number (102664596).

Almost surely, 2^205329191 is an apocalyptic number.

205329191 is a deficient number, since it is larger than the sum of its proper divisors (1).

205329191 is an equidigital number, since it uses as much as digits as its factorization.

205329191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 205329191 is about 14329.3123003164. The cubic root of 205329191 is about 589.9523000793.

The spelling of 205329191 in words is "two hundred five million, three hundred twenty-nine thousand, one hundred ninety-one".