204572969 has 4 divisors (see below), whose sum is σ = 205121796. Its totient is φ = 204024144.

The previous prime is 204572959. The next prime is 204572983. The reversal of 204572969 is 969275402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51308569 + 153264400 = 7163^2 + 12380^2 .

It is a cyclic number.

It is not a de Polignac number, because 204572969 - 2¹² = 204568873 is a prime.

It is a super-2 number, since 2×204572969² = 83700199290949922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204572959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273854 + ... + 274599.

It is an arithmetic number, because the mean of its divisors is an integer number (51280449).

Almost surely, 2^204572969 is an apocalyptic number.

It is an amenable number.

204572969 is a deficient number, since it is larger than the sum of its proper divisors (548827).

204572969 is an equidigital number, since it uses as much as digits as its factorization.

204572969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548826.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 204572969 is about 14302.9007197841. The cubic root of 204572969 is about 589.2271495206.

The spelling of 204572969 in words is "two hundred four million, five hundred seventy-two thousand, nine hundred sixty-nine".