9878439 has 4 divisors (see below), whose sum is σ = 13171256. Its totient is φ = 6585624.

The previous prime is 9878419. The next prime is 9878467. The reversal of 9878439 is 9348789.

9878439 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9348789 = 3 ⋅3116263.

It is not a de Polignac number, because 9878439 - 2¹³ = 9870247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878419) 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, 1646404 + ... + 1646409.

It is an arithmetic number, because the mean of its divisors is an integer number (3292814).

Almost surely, 2^9878439 is an apocalyptic number.

9878439 is a deficient number, since it is larger than the sum of its proper divisors (3292817).

9878439 is a wasteful number, since it uses less digits than its factorization.

9878439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292816.

The product of its digits is 435456, while the sum is 48.

The square root of 9878439 is about 3142.9984091628. The cubic root of 9878439 is about 214.5669234401.

The spelling of 9878439 in words is "nine million, eight hundred seventy-eight thousand, four hundred thirty-nine".