9878605 has 16 divisors (see below), whose sum is σ = 13235904. Its totient is φ = 7015680.

The previous prime is 9878599. The next prime is 9878611. The reversal of 9878605 is 5068789.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9878599) and next prime (9878611).

It is not a de Polignac number, because 9878605 - 2¹⁵ = 9845837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 277 + ... + 4453.

It is an arithmetic number, because the mean of its divisors is an integer number (827244).

Almost surely, 2^9878605 is an apocalyptic number.

It is an amenable number.

9878605 is a deficient number, since it is larger than the sum of its proper divisors (3357299).

9878605 is a wasteful number, since it uses less digits than its factorization.

9878605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 9878605 is about 3143.0248169558. The cubic root of 9878605 is about 214.5681253138.

The spelling of 9878605 in words is "nine million, eight hundred seventy-eight thousand, six hundred five".