204428863 has 2 divisors, whose sum is σ = 204428864. Its totient is φ = 204428862.

The previous prime is 204428857. The next prime is 204428867. The reversal of 204428863 is 368824402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204428863 - 2⁹ = 204428351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204428867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102214431 + 102214432.

It is an arithmetic number, because the mean of its divisors is an integer number (102214432).

Almost surely, 2^204428863 is an apocalyptic number.

204428863 is a deficient number, since it is larger than the sum of its proper divisors (1).

204428863 is an equidigital number, since it uses as much as digits as its factorization.

204428863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 204428863 is about 14297.8621828580. The cubic root of 204428863 is about 589.0887618773.

The spelling of 204428863 in words is "two hundred four million, four hundred twenty-eight thousand, eight hundred sixty-three".