204605957 has 4 divisors (see below), whose sum is σ = 204644640. Its totient is φ = 204567276.

The previous prime is 204605941. The next prime is 204605969. The reversal of 204605957 is 759506402.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 759506402 = 2 ⋅379753201.

It is a cyclic number.

It is not a de Polignac number, because 204605957 - 2⁴ = 204605941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204605957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204605977) 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, 9857 + ... + 22502.

It is an arithmetic number, because the mean of its divisors is an integer number (51161160).

Almost surely, 2^204605957 is an apocalyptic number.

It is an amenable number.

204605957 is a deficient number, since it is larger than the sum of its proper divisors (38683).

204605957 is an equidigital number, since it uses as much as digits as its factorization.

204605957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38682.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 204605957 is about 14304.0538659500. The cubic root of 204605957 is about 589.2588193622.

The spelling of 204605957 in words is "two hundred four million, six hundred five thousand, nine hundred fifty-seven".