9878939 has 6 divisors (see below), whose sum is σ = 11491884. Its totient is φ = 8467620.

The previous prime is 9878929. The next prime is 9879007. The reversal of 9878939 is 9398789.

It is not a de Polignac number, because 9878939 - 2⁴ = 9878923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9878929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100757 + ... + 100854.

It is an arithmetic number, because the mean of its divisors is an integer number (1915314).

Almost surely, 2^9878939 is an apocalyptic number.

9878939 is a deficient number, since it is larger than the sum of its proper divisors (1612945).

9878939 is a wasteful number, since it uses less digits than its factorization.

9878939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201625 (or 201618 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 9878939 is about 3143.0779500356. The cubic root of 9878939 is about 214.5705435010.

The spelling of 9878939 in words is "nine million, eight hundred seventy-eight thousand, nine hundred thirty-nine".