2184991 has 2 divisors, whose sum is σ = 2184992. Its totient is φ = 2184990.

The previous prime is 2184989. The next prime is 2184997. The reversal of 2184991 is 1994812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2184991 - 2¹ = 2184989 is a prime.

Together with 2184989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2184997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092495 + 1092496.

It is an arithmetic number, because the mean of its divisors is an integer number (1092496).

2^2184991 is an apocalyptic number.

2184991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2184991 is an equidigital number, since it uses as much as digits as its factorization.

2184991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 2184991 is about 1478.1715056109. The cubic root of 2184991 is about 129.7627032062.

The spelling of 2184991 in words is "two million, one hundred eighty-four thousand, nine hundred ninety-one".