209061 has 20 divisors (see below), whose sum is σ = 326700. Its totient is φ = 133056.

The previous prime is 209039. The next prime is 209063. The reversal of 209061 is 160902.

It can be written as a sum of positive squares in 2 ways, for example, as 72900 + 136161 = 270^2 + 369^2 .

It is not a de Polignac number, because 209061 - 2⁵ = 209029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2305 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (16335).

2²⁰⁹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

209061 is a deficient number, since it is larger than the sum of its proper divisors (117639).

209061 is an equidigital number, since it uses as much as digits as its factorization.

209061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 209061 is about 457.2318886517. The cubic root of 209061 is about 59.3504944118.

Adding to 209061 its reverse (160902), we get a palindrome (369963).

The spelling of 209061 in words is "two hundred nine thousand, sixty-one".