205414109 has 2 divisors, whose sum is σ = 205414110. Its totient is φ = 205414108.

The previous prime is 205414063. The next prime is 205414129. The reversal of 205414109 is 901414502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176491225 + 28922884 = 13285^2 + 5378^2 .

It is a cyclic number.

It is not a de Polignac number, because 205414109 - 2⁸ = 205413853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205414129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102707054 + 102707055.

It is an arithmetic number, because the mean of its divisors is an integer number (102707055).

Almost surely, 2^205414109 is an apocalyptic number.

It is an amenable number.

205414109 is a deficient number, since it is larger than the sum of its proper divisors (1).

205414109 is an equidigital number, since it uses as much as digits as its factorization.

205414109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 205414109 is about 14332.2750810888. The cubic root of 205414109 is about 590.0336177340.

The spelling of 205414109 in words is "two hundred five million, four hundred fourteen thousand, one hundred nine".