1109403173 has 4 divisors (see below), whose sum is σ = 1109610348. Its totient is φ = 1109196000.

The previous prime is 1109403167. The next prime is 1109403203. The reversal of 1109403173 is 3713049011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 499164964 + 610238209 = 22342^2 + 24703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109403173 - 2¹⁶ = 1109337637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109403073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95336 + ... + 106337.

It is an arithmetic number, because the mean of its divisors is an integer number (277402587).

Almost surely, 2^1109403173 is an apocalyptic number.

It is an amenable number.

1109403173 is a deficient number, since it is larger than the sum of its proper divisors (207175).

1109403173 is an equidigital number, since it uses as much as digits as its factorization.

1109403173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207174.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1109403173 is about 33307.7044090403. The cubic root of 1109403173 is about 1035.2132004183.

The spelling of 1109403173 in words is "one billion, one hundred nine million, four hundred three thousand, one hundred seventy-three".