205144847 has 2 divisors, whose sum is σ = 205144848. Its totient is φ = 205144846.

The previous prime is 205144817. The next prime is 205144859. The reversal of 205144847 is 748441502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205144847 - 2⁸ = 205144591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205144817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102572423 + 102572424.

It is an arithmetic number, because the mean of its divisors is an integer number (102572424).

Almost surely, 2^205144847 is an apocalyptic number.

205144847 is a deficient number, since it is larger than the sum of its proper divisors (1).

205144847 is an equidigital number, since it uses as much as digits as its factorization.

205144847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 205144847 is about 14322.8784467369. The cubic root of 205144847 is about 589.7756946830.

The spelling of 205144847 in words is "two hundred five million, one hundred forty-four thousand, eight hundred forty-seven".