9871209112 has 16 divisors (see below), whose sum is σ = 18654255360. Its totient is φ = 4896741024.

The previous prime is 9871209097. The next prime is 9871209133. The reversal of 9871209112 is 2119021789.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856863 + ... + 4858894.

It is an arithmetic number, because the mean of its divisors is an integer number (1165890960).

Almost surely, 2^9871209112 is an apocalyptic number.

It is an amenable number.

9871209112 is a deficient number, since it is larger than the sum of its proper divisors (8783046248).

9871209112 is a wasteful number, since it uses less digits than its factorization.

9871209112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715890 (or 9715886 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 9871209112 is about 99353.9587132793. The cubic root of 9871209112 is about 2145.1456451185.

The spelling of 9871209112 in words is "nine billion, eight hundred seventy-one million, two hundred nine thousand, one hundred twelve".