204243204349 has 2 divisors, whose sum is σ = 204243204350. Its totient is φ = 204243204348.

The previous prime is 204243204317. The next prime is 204243204359. The reversal of 204243204349 is 943402342402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110212048324 + 94031156025 = 331982^2 + 306645^2 .

It is a cyclic number.

It is not a de Polignac number, because 204243204349 - 2⁵ = 204243204317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204243204359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102121602174 + 102121602175.

It is an arithmetic number, because the mean of its divisors is an integer number (102121602175).

Almost surely, 2^204243204349 is an apocalyptic number.

It is an amenable number.

204243204349 is a deficient number, since it is larger than the sum of its proper divisors (1).

204243204349 is an equidigital number, since it uses as much as digits as its factorization.

204243204349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 204243204349 in words is "two hundred four billion, two hundred forty-three million, two hundred four thousand, three hundred forty-nine".