204139471 has 8 divisors (see below), whose sum is σ = 214119360. Its totient is φ = 194394528.

The previous prime is 204139459. The next prime is 204139487. The reversal of 204139471 is 174931402.

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 204139471 - 2¹⁹ = 203615183 is a prime.

It is a super-3 number, since 3×204139471³ (a number of 26 digits) contains 333 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 (204109471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56956 + ... + 60433.

It is an arithmetic number, because the mean of its divisors is an integer number (26764920).

Almost surely, 2^204139471 is an apocalyptic number.

204139471 is a deficient number, since it is larger than the sum of its proper divisors (9979889).

204139471 is a wasteful number, since it uses less digits than its factorization.

204139471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117473.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 204139471 is about 14287.7384844488. The cubic root of 204139471 is about 588.8106568531.

The spelling of 204139471 in words is "two hundred four million, one hundred thirty-nine thousand, four hundred seventy-one".