2086609 has 4 divisors (see below), whose sum is σ = 2384704. Its totient is φ = 1788516.

The previous prime is 2086589. The next prime is 2086621. The reversal of 2086609 is 9066802.

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.

It is a cyclic number.

It is not a de Polignac number, because 2086609 - 2⁵ = 2086577 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (2086639) 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, 149037 + ... + 149050.

It is an arithmetic number, because the mean of its divisors is an integer number (596176).

2^2086609 is an apocalyptic number.

It is an amenable number.

2086609 is a deficient number, since it is larger than the sum of its proper divisors (298095).

2086609 is an equidigital number, since it uses as much as digits as its factorization.

2086609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298094.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2086609 is about 1444.5099515060. The cubic root of 2086609 is about 127.7851416606.

The spelling of 2086609 in words is "two million, eighty-six thousand, six hundred nine".