8441968921 has 16 divisors (see below), whose sum is σ = 9176872320. Its totient is φ = 7744401280.

The previous prime is 8441968903. The next prime is 8441968939. The reversal of 8441968921 is 1298691448.

It is an interprime number because it is at equal distance from previous prime (8441968903) and next prime (8441968939).

It is a cyclic number.

It is not a de Polignac number, because 8441968921 - 2¹⁹ = 8441444633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8441968901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20230 + ... + 131503.

It is an arithmetic number, because the mean of its divisors is an integer number (573554520).

Almost surely, 2^8441968921 is an apocalyptic number.

It is an amenable number.

8441968921 is a deficient number, since it is larger than the sum of its proper divisors (734903399).

8441968921 is a wasteful number, since it uses less digits than its factorization.

8441968921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151856.

The product of its digits is 995328, while the sum is 52.

The square root of 8441968921 is about 91880.1878589721. The cubic root of 8441968921 is about 2036.1725717611.

The spelling of 8441968921 in words is "eight billion, four hundred forty-one million, nine hundred sixty-eight thousand, nine hundred twenty-one".