9787447879 has 12 divisors (see below), whose sum is σ = 10853323488. Its totient is φ = 8818927040.

The previous prime is 9787447877. The next prime is 9787447889.

9787447879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9787447879 - 2¹ = 9787447877 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 (9787447877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344239 + ... + 371584.

It is an arithmetic number, because the mean of its divisors is an integer number (904443624).

Almost surely, 2^9787447879 is an apocalyptic number.

9787447879 is a deficient number, since it is larger than the sum of its proper divisors (1065875609).

9787447879 is a wasteful number, since it uses less digits than its factorization.

9787447879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715958 (or 715947 counting only the distinct ones).

The product of its digits is 199148544, while the sum is 70.

The square root of 9787447879 is about 98931.5312678420. The cubic root of 9787447879 is about 2139.0609236803.

The spelling of 9787447879 in words is "nine billion, seven hundred eighty-seven million, four hundred forty-seven thousand, eight hundred seventy-nine".