8189813 has 4 divisors (see below), whose sum is σ = 8224320. Its totient is φ = 8155308.

The previous prime is 8189789. The next prime is 8189833. The reversal of 8189813 is 3189818.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3189818 = 2 ⋅1594909.

It is a cyclic number.

It is not a de Polignac number, because 8189813 - 2¹⁸ = 7927669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8189833) 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, 16895 + ... + 17372.

It is an arithmetic number, because the mean of its divisors is an integer number (2056080).

Almost surely, 2^8189813 is an apocalyptic number.

It is an amenable number.

8189813 is a deficient number, since it is larger than the sum of its proper divisors (34507).

8189813 is a wasteful number, since it uses less digits than its factorization.

8189813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34506.

The product of its digits is 13824, while the sum is 38.

The square root of 8189813 is about 2861.7849325203. The cubic root of 8189813 is about 201.5694272763.

The spelling of 8189813 in words is "eight million, one hundred eighty-nine thousand, eight hundred thirteen".