204349381 has 2 divisors, whose sum is σ = 204349382. Its totient is φ = 204349380.

The previous prime is 204349309. The next prime is 204349421. The reversal of 204349381 is 183943402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200081025 + 4268356 = 14145^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 204349381 - 2⁷ = 204349253 is a prime.

It is a super-2 number, since 2×204349381² = 83517339030166322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204344381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102174690 + 102174691.

It is an arithmetic number, because the mean of its divisors is an integer number (102174691).

Almost surely, 2^204349381 is an apocalyptic number.

It is an amenable number.

204349381 is a deficient number, since it is larger than the sum of its proper divisors (1).

204349381 is an equidigital number, since it uses as much as digits as its factorization.

204349381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 204349381 is about 14295.0824061983. The cubic root of 204349381 is about 589.0124060214.

The spelling of 204349381 in words is "two hundred four million, three hundred forty-nine thousand, three hundred eighty-one".