1109071813 has 4 divisors (see below), whose sum is σ = 1122434208. Its totient is φ = 1095709420.

The previous prime is 1109071811. The next prime is 1109071829. The reversal of 1109071813 is 3181709011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1109071813 - 2¹ = 1109071811 is a prime.

It is a super-2 number, since 2×1109071813² = 2460080572782213938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109071811) 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, 6681073 + ... + 6681238.

It is an arithmetic number, because the mean of its divisors is an integer number (280608552).

Almost surely, 2^1109071813 is an apocalyptic number.

It is an amenable number.

1109071813 is a deficient number, since it is larger than the sum of its proper divisors (13362395).

1109071813 is an equidigital number, since it uses as much as digits as its factorization.

1109071813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362394.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 1109071813 is about 33302.7298130348. The cubic root of 1109071813 is about 1035.1101232526.

The spelling of 1109071813 in words is "one billion, one hundred nine million, seventy-one thousand, eight hundred thirteen".