204043393 has 2 divisors, whose sum is σ = 204043394. Its totient is φ = 204043392.

The previous prime is 204043387. The next prime is 204043409. The reversal of 204043393 is 393340402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149401729 + 54641664 = 12223^2 + 7392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204043393 is a prime.

It is not a weakly prime, because it can be changed into another prime (204043093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102021696 + 102021697.

It is an arithmetic number, because the mean of its divisors is an integer number (102021697).

Almost surely, 2^204043393 is an apocalyptic number.

It is an amenable number.

204043393 is a deficient number, since it is larger than the sum of its proper divisors (1).

204043393 is an equidigital number, since it uses as much as digits as its factorization.

204043393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 204043393 is about 14284.3758351564. The cubic root of 204043393 is about 588.7182680115.

Adding to 204043393 its reverse (393340402), we get a palindrome (597383795).

The spelling of 204043393 in words is "two hundred four million, forty-three thousand, three hundred ninety-three".