1109791 has 2 divisors, whose sum is σ = 1109792. Its totient is φ = 1109790.

The previous prime is 1109789. The next prime is 1109813. The reversal of 1109791 is 1979011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109791 - 2¹ = 1109789 is a prime.

Together with 1109789, 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 (1109761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554895 + 554896.

It is an arithmetic number, because the mean of its divisors is an integer number (554896).

2^1109791 is an apocalyptic number.

1109791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109791 is an equidigital number, since it uses as much as digits as its factorization.

1109791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1109791 is about 1053.4661836053. The cubic root of 1109791 is about 103.5333816880.

The spelling of 1109791 in words is "one million, one hundred nine thousand, seven hundred ninety-one".