2209843 has 2 divisors, whose sum is σ = 2209844. Its totient is φ = 2209842.

The previous prime is 2209841. The next prime is 2209849. The reversal of 2209843 is 3489022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2209843 - 2¹ = 2209841 is a prime.

Together with 2209841, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2209841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104921 + 1104922.

It is an arithmetic number, because the mean of its divisors is an integer number (1104922).

2^2209843 is an apocalyptic number.

2209843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209843 is an equidigital number, since it uses as much as digits as its factorization.

2209843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2209843 is about 1486.5540689797. The cubic root of 2209843 is about 130.2528216079.

The spelling of 2209843 in words is "two million, two hundred nine thousand, eight hundred forty-three".