1109171849 has 4 divisors (see below), whose sum is σ = 1157396736. Its totient is φ = 1060946964.

The previous prime is 1109171837. The next prime is 1109171879. The reversal of 1109171849 is 9481719011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9481719011 = 389 ⋅24374599.

It is a cyclic number.

It is not a de Polignac number, because 1109171849 - 2⁸ = 1109171593 is a prime.

It is a super-2 number, since 2×1109171849² = 2460524381228157602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109171809) 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, 24112409 + ... + 24112454.

It is an arithmetic number, because the mean of its divisors is an integer number (289349184).

Almost surely, 2^1109171849 is an apocalyptic number.

It is an amenable number.

1109171849 is a deficient number, since it is larger than the sum of its proper divisors (48224887).

1109171849 is an equidigital number, since it uses as much as digits as its factorization.

1109171849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48224886.

The product of its (nonzero) digits is 18144, while the sum is 41.

The square root of 1109171849 is about 33304.2316980891. The cubic root of 1109171849 is about 1035.1412439195.

The spelling of 1109171849 in words is "one billion, one hundred nine million, one hundred seventy-one thousand, eight hundred forty-nine".