204642653 has 4 divisors (see below), whose sum is σ = 208996800. Its totient is φ = 200288508.

The previous prime is 204642649. The next prime is 204642689. The reversal of 204642653 is 356246402.

204642653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 204642653 - 2² = 204642649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204642623) 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, 2177003 + ... + 2177096.

It is an arithmetic number, because the mean of its divisors is an integer number (52249200).

Almost surely, 2^204642653 is an apocalyptic number.

It is an amenable number.

204642653 is a deficient number, since it is larger than the sum of its proper divisors (4354147).

204642653 is an equidigital number, since it uses as much as digits as its factorization.

204642653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354146.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 204642653 is about 14305.3365217320. The cubic root of 204642653 is about 589.2940450375.

The spelling of 204642653 in words is "two hundred four million, six hundred forty-two thousand, six hundred fifty-three".