1109423 has 4 divisors (see below), whose sum is σ = 1267920. Its totient is φ = 950928.

The previous prime is 1109411. The next prime is 1109431. The reversal of 1109423 is 3249011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3249011 = 73 ⋅44507.

It is a cyclic number.

It is not a de Polignac number, because 1109423 - 2⁸ = 1109167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1109395 and 1109404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109473) 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, 79238 + ... + 79251.

It is an arithmetic number, because the mean of its divisors is an integer number (316980).

2^1109423 is an apocalyptic number.

1109423 is a deficient number, since it is larger than the sum of its proper divisors (158497).

1109423 is an equidigital number, since it uses as much as digits as its factorization.

1109423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158496.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1109423 is about 1053.2915076084. The cubic root of 1109423 is about 103.5219367413.

The spelling of 1109423 in words is "one million, one hundred nine thousand, four hundred twenty-three".