9878789 has 4 divisors (see below), whose sum is σ = 10089024. Its totient is φ = 9668556.

The previous prime is 9878773. The next prime is 9878797.

9878789 is nontrivially palindromic in base 10.

9878789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

9878789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9878789 - 2⁴ = 9878773 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878749) 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, 105047 + ... + 105140.

It is an arithmetic number, because the mean of its divisors is an integer number (2522256).

Almost surely, 2^9878789 is an apocalyptic number.

It is an amenable number.

9878789 is a deficient number, since it is larger than the sum of its proper divisors (210235).

9878789 is a wasteful number, since it uses less digits than its factorization.

9878789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210234.

The product of its digits is 2032128, while the sum is 56.

The square root of 9878789 is about 3143.0540879851. The cubic root of 9878789 is about 214.5694574955.

It can be divided in two parts, 98 and 78789, that added together give a palindrome (78887).

The spelling of 9878789 in words is "nine million, eight hundred seventy-eight thousand, seven hundred eighty-nine".