204919 has 8 divisors (see below), whose sum is σ = 240912. Its totient is φ = 171840.

The previous prime is 204917. The next prime is 204923. The reversal of 204919 is 919402.

204919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 204919 - 2¹ = 204917 is a prime.

It is a super-2 number, since 2×204919² = 83983593122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204893 and 204902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204913) 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, 574 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (30114).

2²⁰⁴⁹¹⁹ is an apocalyptic number.

204919 is a deficient number, since it is larger than the sum of its proper divisors (35993).

204919 is a wasteful number, since it uses less digits than its factorization.

204919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 204919 is about 452.6797985331. The cubic root of 204919 is about 58.9559184278.

The spelling of 204919 in words is "two hundred four thousand, nine hundred nineteen".