204066997 has 16 divisors (see below), whose sum is σ = 228303360. Its totient is φ = 181474048.

The previous prime is 204066959. The next prime is 204067009. The reversal of 204066997 is 799660402.

It is not a de Polignac number, because 204066997 - 2²³ = 195678389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204066917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18768 + ... + 27574.

It is an arithmetic number, because the mean of its divisors is an integer number (14268960).

Almost surely, 2^204066997 is an apocalyptic number.

It is an amenable number.

204066997 is a deficient number, since it is larger than the sum of its proper divisors (24236363).

204066997 is a wasteful number, since it uses less digits than its factorization.

204066997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 204066997 is about 14285.2020286729. The cubic root of 204066997 is about 588.7409683629.

The spelling of 204066997 in words is "two hundred four million, sixty-six thousand, nine hundred ninety-seven".