2164439 has 4 divisors (see below), whose sum is σ = 2175624. Its totient is φ = 2153256.

The previous prime is 2164433. The next prime is 2164441. The reversal of 2164439 is 9344612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2164439 - 2¹⁶ = 2098903 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 6² + 4⁶ + 4⁶ + 3¹⁰ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164433) 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, 5297 + ... + 5690.

It is an arithmetic number, because the mean of its divisors is an integer number (543906).

2^2164439 is an apocalyptic number.

2164439 is a deficient number, since it is larger than the sum of its proper divisors (11185).

2164439 is a wasteful number, since it uses less digits than its factorization.

2164439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184.

The product of its digits is 5184, while the sum is 29.

The square root of 2164439 is about 1471.2032490448. The cubic root of 2164439 is about 129.3545720662.

The spelling of 2164439 in words is "two million, one hundred sixty-four thousand, four hundred thirty-nine".