204124409 has 8 divisors (see below), whose sum is σ = 206338440. Its totient is φ = 201916800.

The previous prime is 204124399. The next prime is 204124421. The reversal of 204124409 is 904421402.

204124409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35046400 + 169078009 = 5920^2 + 13003^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 204124409 - 2¹² = 204120313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204124499) 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, 88349 + ... + 90629.

It is an arithmetic number, because the mean of its divisors is an integer number (25792305).

Almost surely, 2^204124409 is an apocalyptic number.

It is an amenable number.

204124409 is a deficient number, since it is larger than the sum of its proper divisors (2214031).

204124409 is a wasteful number, since it uses less digits than its factorization.

204124409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 204124409 is about 14287.2113794120. The cubic root of 204124409 is about 588.7961751131.

The spelling of 204124409 in words is "two hundred four million, one hundred twenty-four thousand, four hundred nine".