204354661 has 4 divisors (see below), whose sum is σ = 233548192. Its totient is φ = 175161132.

The previous prime is 204354587. The next prime is 204354713. The reversal of 204354661 is 166453402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204354661 - 2¹⁵ = 204321893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204354461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14596755 + ... + 14596768.

It is an arithmetic number, because the mean of its divisors is an integer number (58387048).

Almost surely, 2^204354661 is an apocalyptic number.

It is an amenable number.

204354661 is a deficient number, since it is larger than the sum of its proper divisors (29193531).

204354661 is an equidigital number, since it uses as much as digits as its factorization.

204354661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29193530.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 204354661 is about 14295.2670838988. The cubic root of 204354661 is about 589.0174789651.

The spelling of 204354661 in words is "two hundred four million, three hundred fifty-four thousand, six hundred sixty-one".