204785129 has 8 divisors (see below), whose sum is σ = 207000000. Its totient is φ = 202582512.

The previous prime is 204785107. The next prime is 204785131. The reversal of 204785129 is 921587402.

204785129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204785129 - 2¹² = 204781033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204785092 and 204785101.

It is not an unprimeable number, because it can be changed into a prime (204785149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32747 + ... + 38495.

It is an arithmetic number, because the mean of its divisors is an integer number (25875000).

Almost surely, 2^204785129 is an apocalyptic number.

It is an amenable number.

204785129 is a deficient number, since it is larger than the sum of its proper divisors (2214871).

204785129 is a wasteful number, since it uses less digits than its factorization.

204785129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 204785129 is about 14310.3154752088. The cubic root of 204785129 is about 589.4307724495.

The spelling of 204785129 in words is "two hundred four million, seven hundred eighty-five thousand, one hundred twenty-nine".