9879218409 has 8 divisors (see below), whose sum is σ = 13174979040. Its totient is φ = 6584801696.

The previous prime is 9879218399. The next prime is 9879218423. The reversal of 9879218409 is 9048129789.

9879218409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9879218409 - 2¹⁶ = 9879152873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9879218429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318699 + ... + 348320.

It is an arithmetic number, because the mean of its divisors is an integer number (1646872380).

Almost surely, 2^9879218409 is an apocalyptic number.

It is an amenable number.

9879218409 is a deficient number, since it is larger than the sum of its proper divisors (3295760631).

9879218409 is a wasteful number, since it uses less digits than its factorization.

9879218409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671959.

The product of its (nonzero) digits is 2612736, while the sum is 57.

The square root of 9879218409 is about 99394.2574246621. The cubic root of 9879218409 is about 2145.7256640294.

The spelling of 9879218409 in words is "nine billion, eight hundred seventy-nine million, two hundred eighteen thousand, four hundred nine".