9879789 has 8 divisors (see below), whose sum is σ = 13190112. Its totient is φ = 6578000.

The previous prime is 9879787. The next prime is 9879817.

It is a happy number.

9879789 is nontrivially palindromic in base 10.

9879789 is digitally balanced in base 2, base 3 and base 4, because in such bases 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 9879789 - 2¹ = 9879787 is a prime.

It is a super-2 number, since 2×9879789² = 195220461369042, which contains 22 as substring.

9879789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9879781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414 + ... + 4664.

It is an arithmetic number, because the mean of its divisors is an integer number (1648764).

Almost surely, 2^9879789 is an apocalyptic number.

It is an amenable number.

9879789 is a deficient number, since it is larger than the sum of its proper divisors (3310323).

9879789 is a wasteful number, since it uses less digits than its factorization.

9879789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267.

The product of its digits is 2286144, while the sum is 57.

The square root of 9879789 is about 3143.2131648999. The cubic root of 9879789 is about 214.5766973241.

The spelling of 9879789 in words is "nine million, eight hundred seventy-nine thousand, seven hundred eighty-nine".