1109611 has 2 divisors, whose sum is σ = 1109612. Its totient is φ = 1109610.

The previous prime is 1109609. The next prime is 1109629. The reversal of 1109611 is 1169011.

It is a weak prime.

It is an emirp because it is prime and its reverse (1169011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109611 - 2¹ = 1109609 is a prime.

Together with 1109609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1109411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554805 + 554806.

It is an arithmetic number, because the mean of its divisors is an integer number (554806).

2^1109611 is an apocalyptic number.

1109611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109611 is an equidigital number, since it uses as much as digits as its factorization.

1109611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1109611 is about 1053.3807478780. The cubic root of 1109611 is about 103.5277839324.

The spelling of 1109611 in words is "one million, one hundred nine thousand, six hundred eleven".