2109827 has 4 divisors (see below), whose sum is σ = 2114616. Its totient is φ = 2105040.

The previous prime is 2109799. The next prime is 2109841. The reversal of 2109827 is 7289012.

It is a happy number.

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 2109827 - 2⁸ = 2109571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2109827.

It is not an unprimeable number, because it can be changed into a prime (2109857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658 + ... + 2639.

It is an arithmetic number, because the mean of its divisors is an integer number (528654).

2^2109827 is an apocalyptic number.

2109827 is a deficient number, since it is larger than the sum of its proper divisors (4789).

2109827 is an equidigital number, since it uses as much as digits as its factorization.

2109827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2109827 is about 1452.5243543569. The cubic root of 2109827 is about 128.2573557510.

The spelling of 2109827 in words is "two million, one hundred nine thousand, eight hundred twenty-seven".