204538961 has 16 divisors (see below), whose sum is σ = 232194048. Its totient is φ = 178491600.

The previous prime is 204538949. The next prime is 204538973. The reversal of 204538961 is 169835402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204538949) and next prime (204538973).

It is a cyclic number.

It is not a de Polignac number, because 204538961 - 2⁶ = 204538897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204538921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40946 + ... + 45668.

It is an arithmetic number, because the mean of its divisors is an integer number (14512128).

Almost surely, 2^204538961 is an apocalyptic number.

It is an amenable number.

204538961 is a deficient number, since it is larger than the sum of its proper divisors (27655087).

204538961 is a wasteful number, since it uses less digits than its factorization.

204538961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 204538961 is about 14301.7118206178. The cubic root of 204538961 is about 589.1944968727.

The spelling of 204538961 in words is "two hundred four million, five hundred thirty-eight thousand, nine hundred sixty-one".