8138819 has 4 divisors (see below), whose sum is σ = 8764896. Its totient is φ = 7512744.

The previous prime is 8138807. The next prime is 8138861. The reversal of 8138819 is 9188318.

8138819 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9188318 = 2 ⋅4594159.

It is a cyclic number.

It is not a de Polignac number, because 8138819 - 2¹² = 8134723 is a prime.

It is a super-2 number, since 2×8138819² = 132480749429522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8138219) 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, 313019 + ... + 313044.

It is an arithmetic number, because the mean of its divisors is an integer number (2191224).

Almost surely, 2^8138819 is an apocalyptic number.

8138819 is a deficient number, since it is larger than the sum of its proper divisors (626077).

8138819 is a wasteful number, since it uses less digits than its factorization.

8138819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626076.

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

The square root of 8138819 is about 2852.8615458869. The cubic root of 8138819 is about 201.1501975475.

The spelling of 8138819 in words is "eight million, one hundred thirty-eight thousand, eight hundred nineteen".