9872431779 has 32 divisors (see below), whose sum is σ = 15419787264. Its totient is φ = 5500523520.

The previous prime is 9872431769. The next prime is 9872431801. The reversal of 9872431779 is 9771342789.

It is not a de Polignac number, because 9872431779 - 2⁷ = 9872431651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9872431769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2600907 + ... + 2604699.

It is an arithmetic number, because the mean of its divisors is an integer number (481868352).

Almost surely, 2^9872431779 is an apocalyptic number.

9872431779 is a deficient number, since it is larger than the sum of its proper divisors (5547355485).

9872431779 is a wasteful number, since it uses less digits than its factorization.

9872431779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867.

The product of its digits is 5334336, while the sum is 57.

The square root of 9872431779 is about 99360.1116092368. Note that the first 3 decimals coincide. The cubic root of 9872431779 is about 2145.2342087545.

The spelling of 9872431779 in words is "nine billion, eight hundred seventy-two million, four hundred thirty-one thousand, seven hundred seventy-nine".