9874391121 has 12 divisors (see below), whose sum is σ = 16300582272. Its totient is φ = 5642509176.

The previous prime is 9874391117. The next prime is 9874391123. The reversal of 9874391121 is 1211934789.

9874391121 is a `hidden beast` number, since 98 + 7 + 439 + 1 + 121 = 666.

It is not a de Polignac number, because 9874391121 - 2² = 9874391117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9874391123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78368121 + ... + 78368246.

It is an arithmetic number, because the mean of its divisors is an integer number (1358381856).

Almost surely, 2^9874391121 is an apocalyptic number.

It is an amenable number.

9874391121 is a deficient number, since it is larger than the sum of its proper divisors (6426191151).

9874391121 is a wasteful number, since it uses less digits than its factorization.

9874391121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156736380 (or 156736377 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9874391121 is about 99369.9709218031. The cubic root of 9874391121 is about 2145.3761180477.

The spelling of 9874391121 in words is "nine billion, eight hundred seventy-four million, three hundred ninety-one thousand, one hundred twenty-one".