1109071345 has 16 divisors (see below), whose sum is σ = 1375418880. Its totient is φ = 857635200.

The previous prime is 1109071319. The next prime is 1109071391. The reversal of 1109071345 is 5431709011.

It is not a de Polignac number, because 1109071345 - 2⁷ = 1109071217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 146821 + ... + 154189.

It is an arithmetic number, because the mean of its divisors is an integer number (85963680).

Almost surely, 2^1109071345 is an apocalyptic number.

It is an amenable number.

1109071345 is a deficient number, since it is larger than the sum of its proper divisors (266347535).

1109071345 is an equidigital number, since it uses as much as digits as its factorization.

1109071345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1109071345 is about 33302.7227865831. The cubic root of 1109071345 is about 1035.1099776559.

The spelling of 1109071345 in words is "one billion, one hundred nine million, seventy-one thousand, three hundred forty-five".