204538393 has 2 divisors, whose sum is σ = 204538394. Its totient is φ = 204538392.

The previous prime is 204538357. The next prime is 204538417. The reversal of 204538393 is 393835402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186923584 + 17614809 = 13672^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 204538393 - 2¹⁷ = 204407321 is a prime.

It is a super-2 number, since 2×204538393² = 83671908422044898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204538303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102269196 + 102269197.

It is an arithmetic number, because the mean of its divisors is an integer number (102269197).

Almost surely, 2^204538393 is an apocalyptic number.

It is an amenable number.

204538393 is a deficient number, since it is larger than the sum of its proper divisors (1).

204538393 is an equidigital number, since it uses as much as digits as its factorization.

204538393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 204538393 is about 14301.6919628413. The cubic root of 204538393 is about 589.1939514790.

The spelling of 204538393 in words is "two hundred four million, five hundred thirty-eight thousand, three hundred ninety-three".