1109723043 has 16 divisors (see below), whose sum is σ = 1738308096. Its totient is φ = 620823840.

The previous prime is 1109723029. The next prime is 1109723051. The reversal of 1109723043 is 3403279011.

It is not a de Polignac number, because 1109723043 - 2⁶ = 1109722979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1109723043.

It is not an unprimeable number, because it can be changed into a prime (1109723023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1292955 + ... + 1293812.

It is an arithmetic number, because the mean of its divisors is an integer number (108644256).

Almost surely, 2^1109723043 is an apocalyptic number.

1109723043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1109723043 is a deficient number, since it is larger than the sum of its proper divisors (628585053).

1109723043 is a wasteful number, since it uses less digits than its factorization.

1109723043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586794.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1109723043 is about 33312.5058048775. The cubic root of 1109723043 is about 1035.3126838868.

The spelling of 1109723043 in words is "one billion, one hundred nine million, seven hundred twenty-three thousand, forty-three".