1109993 has 4 divisors (see below), whose sum is σ = 1137108. Its totient is φ = 1082880.

The previous prime is 1109987. The next prime is 1110007. The reversal of 1109993 is 3999011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3999011 = 149 ⋅26839.

It can be written as a sum of positive squares in 2 ways, for example, as 258064 + 851929 = 508^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109993 - 2⁸ = 1109737 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109903) 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 in 3 ways as a sum of consecutive naturals, for example, 13496 + ... + 13577.

It is an arithmetic number, because the mean of its divisors is an integer number (284277).

2^1109993 is an apocalyptic number.

It is an amenable number.

1109993 is a deficient number, since it is larger than the sum of its proper divisors (27115).

1109993 is an equidigital number, since it uses as much as digits as its factorization.

1109993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27114.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1109993 is about 1053.5620532271. The cubic root of 1109993 is about 103.5396628930.

The spelling of 1109993 in words is "one million, one hundred nine thousand, nine hundred ninety-three".