2184989 has 2 divisors, whose sum is σ = 2184990. Its totient is φ = 2184988.

The previous prime is 2184979. The next prime is 2184991. The reversal of 2184989 is 9894812.

2184989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 105625 = 1442^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2184989 is a prime.

Together with 2184991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2184929) 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, 1092494 + 1092495.

It is an arithmetic number, because the mean of its divisors is an integer number (1092495).

2^2184989 is an apocalyptic number.

It is an amenable number.

2184989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2184989 is an equidigital number, since it uses as much as digits as its factorization.

2184989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 2184989 is about 1478.1708290993. The cubic root of 2184989 is about 129.7626636140.

The spelling of 2184989 in words is "two million, one hundred eighty-four thousand, nine hundred eighty-nine".