1091443 has 2 divisors, whose sum is σ = 1091444. Its totient is φ = 1091442.

The previous prime is 1091413. The next prime is 1091459. The reversal of 1091443 is 3441901.

It is a strong prime.

It is an emirp because it is prime and its reverse (3441901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1091443 - 2⁵ = 1091411 is a prime.

1091443 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1091413) 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, 545721 + 545722.

It is an arithmetic number, because the mean of its divisors is an integer number (545722).

2^1091443 is an apocalyptic number.

1091443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091443 is an equidigital number, since it uses as much as digits as its factorization.

1091443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1091443 is about 1044.7214939878. The cubic root of 1091443 is about 102.9596410832.

The spelling of 1091443 in words is "one million, ninety-one thousand, four hundred forty-three".