205341089 has 2 divisors, whose sum is σ = 205341090. Its totient is φ = 205341088.

The previous prime is 205341077. The next prime is 205341091. The reversal of 205341089 is 980143502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125059489 + 80281600 = 11183^2 + 8960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205341089 is a prime.

It is a Sophie Germain prime.

Together with 205341091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (205344089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102670544 + 102670545.

It is an arithmetic number, because the mean of its divisors is an integer number (102670545).

Almost surely, 2^205341089 is an apocalyptic number.

It is an amenable number.

205341089 is a deficient number, since it is larger than the sum of its proper divisors (1).

205341089 is an equidigital number, since it uses as much as digits as its factorization.

205341089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 205341089 is about 14329.7274572826. The cubic root of 205341089 is about 589.9636949795.

The spelling of 205341089 in words is "two hundred five million, three hundred forty-one thousand, eighty-nine".