1109749 has 2 divisors, whose sum is σ = 1109750. Its totient is φ = 1109748.

The previous prime is 1109737. The next prime is 1109761. The reversal of 1109749 is 9479011.

It is a balanced prime because it is at equal distance from previous prime (1109737) and next prime (1109761).

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 79524 = 1015^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109749 - 2¹⁵ = 1076981 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1109749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109789) 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, 554874 + 554875.

It is an arithmetic number, because the mean of its divisors is an integer number (554875).

2^1109749 is an apocalyptic number.

It is an amenable number.

1109749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109749 is an equidigital number, since it uses as much as digits as its factorization.

1109749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1109749 is about 1053.4462492220. The cubic root of 1109749 is about 103.5320755991.

The spelling of 1109749 in words is "one million, one hundred nine thousand, seven hundred forty-nine".