204309983 has 4 divisors (see below), whose sum is σ = 215063160. Its totient is φ = 193556808.

The previous prime is 204309977. The next prime is 204310003. The reversal of 204309983 is 389903402.

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 204309983 - 2¹² = 204305887 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 (204309953) 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, 5376560 + ... + 5376597.

It is an arithmetic number, because the mean of its divisors is an integer number (53765790).

Almost surely, 2^204309983 is an apocalyptic number.

204309983 is a deficient number, since it is larger than the sum of its proper divisors (10753177).

204309983 is a wasteful number, since it uses less digits than its factorization.

204309983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10753176.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 204309983 is about 14293.7043134381. The cubic root of 204309983 is about 588.9745502632.

The spelling of 204309983 in words is "two hundred four million, three hundred nine thousand, nine hundred eighty-three".