1099843 has 2 divisors, whose sum is σ = 1099844. Its totient is φ = 1099842.

The previous prime is 1099841. The next prime is 1099859. The reversal of 1099843 is 3489901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1099843 - 2¹ = 1099841 is a prime.

Together with 1099841, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1099799 and 1099808.

It is not a weakly prime, because it can be changed into another prime (1099841) 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 as a sum of consecutive naturals, namely, 549921 + 549922.

It is an arithmetic number, because the mean of its divisors is an integer number (549922).

2^1099843 is an apocalyptic number.

1099843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099843 is an equidigital number, since it uses as much as digits as its factorization.

1099843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1099843 is about 1048.7339986860. The cubic root of 1099843 is about 103.2231001611.

The spelling of 1099843 in words is "one million, ninety-nine thousand, eight hundred forty-three".