108512809 has 4 divisors (see below), whose sum is σ = 112254660. Its totient is φ = 104770960.

The previous prime is 108512797. The next prime is 108512813. The reversal of 108512809 is 908215801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908215801 = 37 ⋅24546373.

It can be written as a sum of positive squares in 2 ways, for example, as 21650409 + 86862400 = 4653^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 108512809 - 2⁵ = 108512777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108542809) 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, 1870882 + ... + 1870939.

It is an arithmetic number, because the mean of its divisors is an integer number (28063665).

Almost surely, 2^108512809 is an apocalyptic number.

It is an amenable number.

108512809 is a deficient number, since it is larger than the sum of its proper divisors (3741851).

108512809 is an equidigital number, since it uses as much as digits as its factorization.

108512809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741850.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 108512809 is about 10416.9481615298. The cubic root of 108512809 is about 476.9728605233.

The spelling of 108512809 in words is "one hundred eight million, five hundred twelve thousand, eight hundred nine".