204864469 has 4 divisors (see below), whose sum is σ = 204893100. Its totient is φ = 204835840.

The previous prime is 204864397. The next prime is 204864509. The reversal of 204864469 is 964468402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 170641969 + 34222500 = 13063^2 + 5850^2 .

It is a cyclic number.

It is not a de Polignac number, because 204864469 - 2¹¹ = 204862421 is a prime.

It is a super-2 number, since 2×204864469² = 83938901317303922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204861469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6807 + ... + 21355.

It is an arithmetic number, because the mean of its divisors is an integer number (51223275).

Almost surely, 2^204864469 is an apocalyptic number.

It is an amenable number.

204864469 is a deficient number, since it is larger than the sum of its proper divisors (28631).

204864469 is a wasteful number, since it uses less digits than its factorization.

204864469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28630.

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 204864469 is about 14313.0873329272. The cubic root of 204864469 is about 589.5068837693.

The spelling of 204864469 in words is "two hundred four million, eight hundred sixty-four thousand, four hundred sixty-nine".