204043247 has 2 divisors, whose sum is σ = 204043248. Its totient is φ = 204043246.

The previous prime is 204043241. The next prime is 204043277. The reversal of 204043247 is 742340402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204043247 - 2⁸ = 204042991 is a prime.

It is a super-3 number, since 3×204043247³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204043241) 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, 102021623 + 102021624.

It is an arithmetic number, because the mean of its divisors is an integer number (102021624).

Almost surely, 2^204043247 is an apocalyptic number.

204043247 is a deficient number, since it is larger than the sum of its proper divisors (1).

204043247 is an equidigital number, since it uses as much as digits as its factorization.

204043247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 204043247 is about 14284.3707246767. The cubic root of 204043247 is about 588.7181275954.

Adding to 204043247 its reverse (742340402), we get a palindrome (946383649).

The spelling of 204043247 in words is "two hundred four million, forty-three thousand, two hundred forty-seven".