9865139 has 2 divisors, whose sum is σ = 9865140. Its totient is φ = 9865138.

The previous prime is 9865129. The next prime is 9865153. The reversal of 9865139 is 9315689.

9865139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (9315689) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9865139 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 9865096 and 9865105.

It is not a weakly prime, because it can be changed into another prime (9865109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4932569 + 4932570.

It is an arithmetic number, because the mean of its divisors is an integer number (4932570).

Almost surely, 2^9865139 is an apocalyptic number.

9865139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9865139 is an equidigital number, since it uses as much as digits as its factorization.

9865139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 9865139 is about 3140.8818825292. The cubic root of 9865139 is about 214.4705849475.

The spelling of 9865139 in words is "nine million, eight hundred sixty-five thousand, one hundred thirty-nine".