209260085 has 16 divisors (see below), whose sum is σ = 260582400. Its totient is φ = 161130816.

The previous prime is 209260081. The next prime is 209260109. The reversal of 209260085 is 580062902.

209260085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 209260085 - 2² = 209260081 is a prime.

It is a super-3 number, since 3×209260085³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209260081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48236 + ... + 52394.

It is an arithmetic number, because the mean of its divisors is an integer number (16286400).

Almost surely, 2^209260085 is an apocalyptic number.

It is an amenable number.

209260085 is a deficient number, since it is larger than the sum of its proper divisors (51322315).

209260085 is a wasteful number, since it uses less digits than its factorization.

209260085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 209260085 is about 14465.8247258841. The cubic root of 209260085 is about 593.6932790137.

The spelling of 209260085 in words is "two hundred nine million, two hundred sixty thousand, eighty-five".