2164809 has 8 divisors (see below), whose sum is σ = 2894560. Its totient is φ = 1439136.

The previous prime is 2164807. The next prime is 2164817. The reversal of 2164809 is 9084612.

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

It is not a de Polignac number, because 2164809 - 2¹ = 2164807 is a prime.

It is a Duffinian number.

2164809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2164801) 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, 582 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (361820).

2^2164809 is an apocalyptic number.

It is an amenable number.

2164809 is a deficient number, since it is larger than the sum of its proper divisors (729751).

2164809 is a wasteful number, since it uses less digits than its factorization.

2164809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2164809 is about 1471.3289910826. The cubic root of 2164809 is about 129.3619424848.

The spelling of 2164809 in words is "two million, one hundred sixty-four thousand, eight hundred nine".