1109173945 has 16 divisors (see below), whose sum is σ = 1473686208. Its totient is φ = 794629440.

The previous prime is 1109173927. The next prime is 1109173979. The reversal of 1109173945 is 5493719011.

It is not a de Polignac number, because 1109173945 - 2⁵ = 1109173913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1109173898 and 1109173907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146814 + ... + 154183.

It is an arithmetic number, because the mean of its divisors is an integer number (92105388).

Almost surely, 2^1109173945 is an apocalyptic number.

It is an amenable number.

1109173945 is a deficient number, since it is larger than the sum of its proper divisors (364512263).

1109173945 is a wasteful number, since it uses less digits than its factorization.

1109173945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301080.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 1109173945 is about 33304.2631655468. The cubic root of 1109173945 is about 1035.1418959539.

The spelling of 1109173945 in words is "one billion, one hundred nine million, one hundred seventy-three thousand, nine hundred forty-five".