2086209 has 8 divisors (see below), whose sum is σ = 3090720. Its totient is φ = 1390788.

The previous prime is 2086199. The next prime is 2086211. The reversal of 2086209 is 9026802.

It is not a de Polignac number, because 2086209 - 2⁷ = 2086081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 77267 = 2086209 / (2 + 0 + 8 + 6 + 2 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (2086009) 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, 38607 + ... + 38660.

It is an arithmetic number, because the mean of its divisors is an integer number (386340).

2^2086209 is an apocalyptic number.

It is an amenable number.

2086209 is a deficient number, since it is larger than the sum of its proper divisors (1004511).

2086209 is an equidigital number, since it uses as much as digits as its factorization.

2086209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77276 (or 77270 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2086209 is about 1444.3714896106. The cubic root of 2086209 is about 127.7769757284.

The spelling of 2086209 in words is "two million, eighty-six thousand, two hundred nine".