204688513 has 4 divisors (see below), whose sum is σ = 204758320. Its totient is φ = 204618708.

The previous prime is 204688511. The next prime is 204688529. The reversal of 204688513 is 315886402.

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.

It is a cyclic number.

It is not a de Polignac number, because 204688513 - 2¹ = 204688511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204688511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30303 + ... + 36436.

It is an arithmetic number, because the mean of its divisors is an integer number (51189580).

Almost surely, 2^204688513 is an apocalyptic number.

It is an amenable number.

204688513 is a deficient number, since it is larger than the sum of its proper divisors (69807).

204688513 is an equidigital number, since it uses as much as digits as its factorization.

204688513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69806.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 204688513 is about 14306.9393302691. The cubic root of 204688513 is about 589.3380616131.

The spelling of 204688513 in words is "two hundred four million, six hundred eighty-eight thousand, five hundred thirteen".