204621623 has 4 divisors (see below), whose sum is σ = 204809928. Its totient is φ = 204433320.

The previous prime is 204621619. The next prime is 204621629. The reversal of 204621623 is 326126402.

204621623 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.

It is a cyclic number.

It is not a de Polignac number, because 204621623 - 2² = 204621619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204621592 and 204621601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204621629) 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, 92513 + ... + 94698.

It is an arithmetic number, because the mean of its divisors is an integer number (51202482).

Almost surely, 2^204621623 is an apocalyptic number.

204621623 is a deficient number, since it is larger than the sum of its proper divisors (188305).

204621623 is a wasteful number, since it uses less digits than its factorization.

204621623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188304.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 204621623 is about 14304.6014624665. The cubic root of 204621623 is about 589.2738581766.

The spelling of 204621623 in words is "two hundred four million, six hundred twenty-one thousand, six hundred twenty-three".