2166829 has 6 divisors (see below), whose sum is σ = 2520654. Its totient is φ = 1857240.

The previous prime is 2166821. The next prime is 2166833. The reversal of 2166829 is 9286612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 5929 = 1470^2 + 77^2 .

It is not a de Polignac number, because 2166829 - 2³ = 2166821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166794 and 2166803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166821) 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 5 ways as a sum of consecutive naturals, for example, 22062 + ... + 22159.

It is an arithmetic number, because the mean of its divisors is an integer number (420109).

2^2166829 is an apocalyptic number.

It is an amenable number.

2166829 is a deficient number, since it is larger than the sum of its proper divisors (353825).

2166829 is an equidigital number, since it uses as much as digits as its factorization.

2166829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44235 (or 44228 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 2166829 is about 1472.0152852467. The cubic root of 2166829 is about 129.4021661857.

The spelling of 2166829 in words is "two million, one hundred sixty-six thousand, eight hundred twenty-nine".