8189139 has 16 divisors (see below), whose sum is σ = 12745728. Its totient is φ = 4579392.

The previous prime is 8189131. The next prime is 8189143. The reversal of 8189139 is 9319818.

It is a happy number.

It is not a de Polignac number, because 8189139 - 2³ = 8189131 is a prime.

It is a super-2 number, since 2×8189139² = 134123995122642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8189097 and 8189106.

It is not an unprimeable number, because it can be changed into a prime (8189131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3162 + ... + 5135.

It is an arithmetic number, because the mean of its divisors is an integer number (796608).

Almost surely, 2^8189139 is an apocalyptic number.

8189139 is a deficient number, since it is larger than the sum of its proper divisors (4556589).

8189139 is a wasteful number, since it uses less digits than its factorization.

8189139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8354.

The product of its digits is 15552, while the sum is 39.

The square root of 8189139 is about 2861.6671714230. The cubic root of 8189139 is about 201.5638975806.

The spelling of 8189139 in words is "eight million, one hundred eighty-nine thousand, one hundred thirty-nine".