9789779879 has 32 divisors (see below), whose sum is σ = 11067936768. Its totient is φ = 8582112000.

The previous prime is 9789779843. The next prime is 9789779891.

9789779879 is nontrivially palindromic in base 10.

9789779879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9789779879 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 (9789772879) 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 31 ways as a sum of consecutive naturals, for example, 21144002 + ... + 21144464.

It is an arithmetic number, because the mean of its divisors is an integer number (345873024).

Almost surely, 2^9789779879 is an apocalyptic number.

9789779879 is a deficient number, since it is larger than the sum of its proper divisors (1278156889).

9789779879 is a wasteful number, since it uses less digits than its factorization.

9789779879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its digits is 1008189504, while the sum is 80.

The square root of 9789779879 is about 98943.3164948497. The cubic root of 9789779879 is about 2139.2307975164.

The spelling of 9789779879 in words is "nine billion, seven hundred eighty-nine million, seven hundred seventy-nine thousand, eight hundred seventy-nine".