205089 has 8 divisors (see below), whose sum is σ = 276000. Its totient is φ = 135456.

The previous prime is 205081. The next prime is 205097. The reversal of 205089 is 980502.

205089 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (205081) and next prime (205097).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205089 - 2³ = 205081 is a prime.

It is a super-2 number, since 2×205089² = 84122995842, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (205081) 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, 162 + ... + 660.

It is an arithmetic number, because the mean of its divisors is an integer number (34500).

2²⁰⁵⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

205089 is a deficient number, since it is larger than the sum of its proper divisors (70911).

205089 is a wasteful number, since it uses less digits than its factorization.

205089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 205089 is about 452.8675303000. The cubic root of 205089 is about 58.9722171212.

The spelling of 205089 in words is "two hundred five thousand, eighty-nine".