204405349 has 2 divisors, whose sum is σ = 204405350. Its totient is φ = 204405348.

The previous prime is 204405343. The next prime is 204405367. The reversal of 204405349 is 943504402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182736324 + 21669025 = 13518^2 + 4655^2 .

It is a cyclic number.

It is not a de Polignac number, because 204405349 - 2⁵ = 204405317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204405349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204405343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102202674 + 102202675.

It is an arithmetic number, because the mean of its divisors is an integer number (102202675).

Almost surely, 2^204405349 is an apocalyptic number.

It is an amenable number.

204405349 is a deficient number, since it is larger than the sum of its proper divisors (1).

204405349 is an equidigital number, since it uses as much as digits as its factorization.

204405349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 204405349 is about 14297.0398684483. The cubic root of 204405349 is about 589.0661747793.

The spelling of 204405349 in words is "two hundred four million, four hundred five thousand, three hundred forty-nine".