204413009 has 4 divisors (see below), whose sum is σ = 204443316. Its totient is φ = 204382704.

The previous prime is 204412987. The next prime is 204413017. The reversal of 204413009 is 900314402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 191739409 + 12673600 = 13847^2 + 3560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204413009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204413059) 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, 47 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (51110829).

Almost surely, 2^204413009 is an apocalyptic number.

It is an amenable number.

204413009 is a deficient number, since it is larger than the sum of its proper divisors (30307).

204413009 is a wasteful number, since it uses less digits than its factorization.

204413009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30306.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 204413009 is about 14297.3077535598. The cubic root of 204413009 is about 589.0735330188.

The spelling of 204413009 in words is "two hundred four million, four hundred thirteen thousand, nine".