204899953 has 2 divisors, whose sum is σ = 204899954. Its totient is φ = 204899952.

The previous prime is 204899951. The next prime is 204899999. The reversal of 204899953 is 359998402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121506529 + 83393424 = 11023^2 + 9132^2 .

It is a cyclic number.

It is not a de Polignac number, because 204899953 - 2¹ = 204899951 is a prime.

Together with 204899951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 204899897 and 204899906.

It is not a weakly prime, because it can be changed into another prime (204899951) 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, 102449976 + 102449977.

It is an arithmetic number, because the mean of its divisors is an integer number (102449977).

Almost surely, 2^204899953 is an apocalyptic number.

It is an amenable number.

204899953 is a deficient number, since it is larger than the sum of its proper divisors (1).

204899953 is an equidigital number, since it uses as much as digits as its factorization.

204899953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 204899953 is about 14314.3268441097. The cubic root of 204899953 is about 589.5409174157.

The spelling of 204899953 in words is "two hundred four million, eight hundred ninety-nine thousand, nine hundred fifty-three".