204690669 has 8 divisors (see below), whose sum is σ = 273006240. Its totient is φ = 136417776.

The previous prime is 204690653. The next prime is 204690701. The reversal of 204690669 is 966096402.

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

It is not a de Polignac number, because 204690669 - 2⁴ = 204690653 is a prime.

It is a super-2 number, since 2×204690669² = 83796539951335122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204690669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204690649) 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, 3042 + ... + 20460.

It is an arithmetic number, because the mean of its divisors is an integer number (34125780).

Almost surely, 2^204690669 is an apocalyptic number.

It is an amenable number.

204690669 is a deficient number, since it is larger than the sum of its proper divisors (68315571).

204690669 is a wasteful number, since it uses less digits than its factorization.

204690669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21339.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 204690669 is about 14307.0146781221. The cubic root of 204690669 is about 589.3401307870.

The spelling of 204690669 in words is "two hundred four million, six hundred ninety thousand, six hundred sixty-nine".