204406393 has 2 divisors, whose sum is σ = 204406394. Its totient is φ = 204406392.

The previous prime is 204406387. The next prime is 204406403. The reversal of 204406393 is 393604402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199148544 + 5257849 = 14112^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 204406393 - 2⁹ = 204405881 is a prime.

It is not a weakly prime, because it can be changed into another prime (204406193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102203196 + 102203197.

It is an arithmetic number, because the mean of its divisors is an integer number (102203197).

Almost surely, 2^204406393 is an apocalyptic number.

It is an amenable number.

204406393 is a deficient number, since it is larger than the sum of its proper divisors (1).

204406393 is an equidigital number, since it uses as much as digits as its factorization.

204406393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 204406393 is about 14297.0763794560. The cubic root of 204406393 is about 589.0671776625.

The spelling of 204406393 in words is "two hundred four million, four hundred six thousand, three hundred ninety-three".