1105109987 has 4 divisors (see below), whose sum is σ = 1111498080. Its totient is φ = 1098721896.

The previous prime is 1105109953. The next prime is 1105110011. The reversal of 1105109987 is 7899015011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7899015011 = 431 ⋅18327181.

It is a cyclic number.

It is not a de Polignac number, because 1105109987 - 2³⁰ = 31368163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1105109087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3193787 + ... + 3194132.

It is an arithmetic number, because the mean of its divisors is an integer number (277874520).

Almost surely, 2^1105109987 is an apocalyptic number.

1105109987 is a deficient number, since it is larger than the sum of its proper divisors (6388093).

1105109987 is an equidigital number, since it uses as much as digits as its factorization.

1105109987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388092.

The product of its (nonzero) digits is 22680, while the sum is 41.

The square root of 1105109987 is about 33243.1945967893. The cubic root of 1105109987 is about 1033.8761126821.

The spelling of 1105109987 in words is "one billion, one hundred five million, one hundred nine thousand, nine hundred eighty-seven".