9868139 has 4 divisors (see below), whose sum is σ = 9875400. Its totient is φ = 9860880.

The previous prime is 9868129. The next prime is 9868141. The reversal of 9868139 is 9318689.

9868139 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9318689 = 491 ⋅18979.

It is a cyclic number.

It is not a de Polignac number, because 9868139 - 2⁸ = 9867883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9868139.

It is not an unprimeable number, because it can be changed into a prime (9868129) 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 in 3 ways as a sum of consecutive naturals, for example, 914 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (2468850).

Almost surely, 2^9868139 is an apocalyptic number.

9868139 is a deficient number, since it is larger than the sum of its proper divisors (7261).

9868139 is a wasteful number, since it uses less digits than its factorization.

9868139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260.

The product of its digits is 93312, while the sum is 44.

The square root of 9868139 is about 3141.3594191050. The cubic root of 9868139 is about 214.4923229938.

The spelling of 9868139 in words is "nine million, eight hundred sixty-eight thousand, one hundred thirty-nine".