2164839 has 4 divisors (see below), whose sum is σ = 2886456. Its totient is φ = 1443224.

The previous prime is 2164817. The next prime is 2164843. The reversal of 2164839 is 9384612.

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 2164839 - 2⁵ = 2164807 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 6⁵ + 4 + 8⁷ + 3¹⁰ + 9³ .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164859) 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, 360804 + ... + 360809.

It is an arithmetic number, because the mean of its divisors is an integer number (721614).

2^2164839 is an apocalyptic number.

2164839 is a deficient number, since it is larger than the sum of its proper divisors (721617).

2164839 is an equidigital number, since it uses as much as digits as its factorization.

2164839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721616.

The product of its digits is 10368, while the sum is 33.

The square root of 2164839 is about 1471.3391859119. The cubic root of 2164839 is about 129.3625400495.

It can be divided in two parts, 2164 and 839, that added together give a palindrome (3003).

The spelling of 2164839 in words is "two million, one hundred sixty-four thousand, eight hundred thirty-nine".