2161829 has 2 divisors, whose sum is σ = 2161830. Its totient is φ = 2161828.

The previous prime is 2161823. The next prime is 2161843. The reversal of 2161829 is 9281612.

2161829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2024929 + 136900 = 1423^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161829 - 2⁴ = 2161813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080914 + 1080915.

It is an arithmetic number, because the mean of its divisors is an integer number (1080915).

2^2161829 is an apocalyptic number.

It is an amenable number.

2161829 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161829 is an equidigital number, since it uses as much as digits as its factorization.

2161829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 2161829 is about 1470.3159524402. The cubic root of 2161829 is about 129.3025568590.

The spelling of 2161829 in words is "two million, one hundred sixty-one thousand, eight hundred twenty-nine".