204135647 has 2 divisors, whose sum is σ = 204135648. Its totient is φ = 204135646.

The previous prime is 204135641. The next prime is 204135653. The reversal of 204135647 is 746531402.

It is a balanced prime because it is at equal distance from previous prime (204135641) and next prime (204135653).

It is a cyclic number.

It is not a de Polignac number, because 204135647 - 2⁶ = 204135583 is a prime.

It is a super-2 number, since 2×204135647² = 83342724752217218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204135641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102067823 + 102067824.

It is an arithmetic number, because the mean of its divisors is an integer number (102067824).

Almost surely, 2^204135647 is an apocalyptic number.

204135647 is a deficient number, since it is larger than the sum of its proper divisors (1).

204135647 is an equidigital number, since it uses as much as digits as its factorization.

204135647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 204135647 is about 14287.6046627838. The cubic root of 204135647 is about 588.8069802392.

The spelling of 204135647 in words is "two hundred four million, one hundred thirty-five thousand, six hundred forty-seven".