204745729 has 8 divisors (see below), whose sum is σ = 215840000. Its totient is φ = 193683312.

The previous prime is 204745693. The next prime is 204745733. The reversal of 204745729 is 927547402.

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 204745729 - 2²¹ = 202648577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204745691 and 204745700.

It is not an unprimeable number, because it can be changed into a prime (204745799) 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, 5872 + ... + 21070.

It is an arithmetic number, because the mean of its divisors is an integer number (26980000).

Almost surely, 2^204745729 is an apocalyptic number.

It is an amenable number.

204745729 is a deficient number, since it is larger than the sum of its proper divisors (11094271).

204745729 is a wasteful number, since it uses less digits than its factorization.

204745729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15927.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 204745729 is about 14308.9387796580. The cubic root of 204745729 is about 589.3929684968.

The spelling of 204745729 in words is "two hundred four million, seven hundred forty-five thousand, seven hundred twenty-nine".