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204089 = 1271607
BaseRepresentation
bin110001110100111001
3101100221212
4301310321
523012324
64212505
71510004
oct616471
9340855
10204089
1112a376
129a135
1371b82
145453b
154070e
hex31d39

204089 has 4 divisors (see below), whose sum is σ = 205824. Its totient is φ = 202356.

The previous prime is 204067. The next prime is 204101. The reversal of 204089 is 980402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 980402 = 2490201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-204089 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204089.

It is not an unprimeable number, because it can be changed into a prime (204019) 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, 677 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (51456).

2204089 is an apocalyptic number.

It is an amenable number.

204089 is a deficient number, since it is larger than the sum of its proper divisors (1735).

204089 is a wasteful number, since it uses less digits than its factorization.

204089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 204089 is about 451.7621055379. The cubic root of 204089 is about 58.8762127430.

The spelling of 204089 in words is "two hundred four thousand, eighty-nine".

Divisors: 1 127 1607 204089