204042623 has 4 divisors (see below), whose sum is σ = 204186840. Its totient is φ = 203898408.

The previous prime is 204042617. The next prime is 204042649. The reversal of 204042623 is 326240402.

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 204042623 - 2⁴ = 204042607 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 (204042613) 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, 69965 + ... + 72822.

It is an arithmetic number, because the mean of its divisors is an integer number (51046710).

Almost surely, 2^204042623 is an apocalyptic number.

204042623 is a deficient number, since it is larger than the sum of its proper divisors (144217).

204042623 is a wasteful number, since it uses less digits than its factorization.

204042623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144216.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 204042623 is about 14284.3488826057. The cubic root of 204042623 is about 588.7175274604.

The spelling of 204042623 in words is "two hundred four million, forty-two thousand, six hundred twenty-three".