204609057 has 4 divisors (see below), whose sum is σ = 272812080. Its totient is φ = 136406036.

The previous prime is 204609019. The next prime is 204609071. The reversal of 204609057 is 750906402.

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 204609057 - 2⁸ = 204608801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204609257) 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, 34101507 + ... + 34101512.

It is an arithmetic number, because the mean of its divisors is an integer number (68203020).

Almost surely, 2^204609057 is an apocalyptic number.

It is an amenable number.

204609057 is a deficient number, since it is larger than the sum of its proper divisors (68203023).

204609057 is an equidigital number, since it uses as much as digits as its factorization.

204609057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68203022.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 204609057 is about 14304.1622264291. The cubic root of 204609057 is about 589.2617953151.

The spelling of 204609057 in words is "two hundred four million, six hundred nine thousand, fifty-seven".