9872221961 has 8 divisors (see below), whose sum is σ = 11305710720. Its totient is φ = 8444526048.

The previous prime is 9872221921. The next prime is 9872221973. The reversal of 9872221961 is 1691222789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9872221961 - 2¹⁰ = 9872220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9872221921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444556 + ... + 1451373.

It is an arithmetic number, because the mean of its divisors is an integer number (1413213840).

Almost surely, 2^9872221961 is an apocalyptic number.

It is an amenable number.

9872221961 is a deficient number, since it is larger than the sum of its proper divisors (1433488759).

9872221961 is a wasteful number, since it uses less digits than its factorization.

9872221961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896423.

The product of its digits is 217728, while the sum is 47.

The square root of 9872221961 is about 99359.0557573893. The cubic root of 9872221961 is about 2145.2190111500.

The spelling of 9872221961 in words is "nine billion, eight hundred seventy-two million, two hundred twenty-one thousand, nine hundred sixty-one".