204109853 has 2 divisors, whose sum is σ = 204109854. Its totient is φ = 204109852.

The previous prime is 204109811. The next prime is 204109901. The reversal of 204109853 is 358901402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 60637369 = 11978^2 + 7787^2 .

It is a cyclic number.

It is not a de Polignac number, because 204109853 - 2¹⁰ = 204108829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204109253) 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, 102054926 + 102054927.

It is an arithmetic number, because the mean of its divisors is an integer number (102054927).

Almost surely, 2^204109853 is an apocalyptic number.

It is an amenable number.

204109853 is a deficient number, since it is larger than the sum of its proper divisors (1).

204109853 is an equidigital number, since it uses as much as digits as its factorization.

204109853 is an odious number, because the sum of its binary digits is odd.

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

The square root of 204109853 is about 14286.7019637144. The cubic root of 204109853 is about 588.7821792026.

The spelling of 204109853 in words is "two hundred four million, one hundred nine thousand, eight hundred fifty-three".