204384981 has 4 divisors (see below), whose sum is σ = 272513312. Its totient is φ = 136256652.

The previous prime is 204384967. The next prime is 204384991. The reversal of 204384981 is 189483402.

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 not a de Polignac number, because 204384981 - 2⁷ = 204384853 is a prime.

It is a super-2 number, since 2×204384981² = 83546440916740722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204384991) 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, 34064161 + ... + 34064166.

It is an arithmetic number, because the mean of its divisors is an integer number (68128328).

Almost surely, 2^204384981 is an apocalyptic number.

It is an amenable number.

204384981 is a deficient number, since it is larger than the sum of its proper divisors (68128331).

204384981 is an equidigital number, since it uses as much as digits as its factorization.

204384981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68128330.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 204384981 is about 14296.3275354197. The cubic root of 204384981 is about 589.0466082685.

The spelling of 204384981 in words is "two hundred four million, three hundred eighty-four thousand, nine hundred eighty-one".