204138623 has 8 divisors (see below), whose sum is σ = 220510416. Its totient is φ = 187862400.

The previous prime is 204138619. The next prime is 204138647. The reversal of 204138623 is 326831402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204138623 - 2² = 204138619 is a prime.

It is a super-3 number, since 3×204138623³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204138653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19418 + ... + 28023.

It is an arithmetic number, because the mean of its divisors is an integer number (27563802).

Almost surely, 2^204138623 is an apocalyptic number.

204138623 is a deficient number, since it is larger than the sum of its proper divisors (16371793).

204138623 is a wasteful number, since it uses less digits than its factorization.

204138623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47785.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 204138623 is about 14287.7088086229. The cubic root of 204138623 is about 588.8098415410.

The spelling of 204138623 in words is "two hundred four million, one hundred thirty-eight thousand, six hundred twenty-three".