8421916441 has 3 divisors (see below), whose sum is σ = 8422008213. Its totient is φ = 8421824670.

The previous prime is 8421916439. The next prime is 8421916469. The reversal of 8421916441 is 1446191248.

It is a happy number.

The square root of 8421916441 is 91771.

It is a perfect power (a square), and thus also a powerful number.

8421916441 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8421916441 - 2¹ = 8421916439 is a prime.

It is a super-3 number, since 3×8421916441³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8421916394 and 8421916403.

It is not an unprimeable number, because it can be changed into a prime (8421916541) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45886 + ... + 137656.

It is an arithmetic number, because the mean of its divisors is an integer number (2807336071).

Almost surely, 2^8421916441 is an apocalyptic number.

8421916441 is the 91771-st square number.

8421916441 is the 45886-th centered octagonal number.

It is an amenable number.

8421916441 is a deficient number, since it is larger than the sum of its proper divisors (91772).

8421916441 is an frugal number, since it uses more digits than its factorization.

8421916441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183542 (or 91771 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The cubic root of 8421916441 is about 2034.5590981982.

The spelling of 8421916441 in words is "eight billion, four hundred twenty-one million, nine hundred sixteen thousand, four hundred forty-one".