8443334421 has 12 divisors (see below), whose sum is σ = 12198534348. Its totient is φ = 5627686464.

The previous prime is 8443334377. The next prime is 8443334447. The reversal of 8443334421 is 1244333448.

It can be written as a sum of positive squares in 2 ways, for example, as 3034467396 + 5408867025 = 55086^2 + 73545^2 .

It is not a de Polignac number, because 8443334421 - 2⁶ = 8443334357 is a prime.

It is a super-2 number, since 2×8443334421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8443334321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54730 + ... + 141003.

It is an arithmetic number, because the mean of its divisors is an integer number (1016544529).

Almost surely, 2^8443334421 is an apocalyptic number.

It is an amenable number.

8443334421 is a deficient number, since it is larger than the sum of its proper divisors (3755199927).

8443334421 is a wasteful number, since it uses less digits than its factorization.

8443334421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200532 (or 200529 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 8443334421 is about 91887.6184314296. The cubic root of 8443334421 is about 2036.2823504069.

Adding to 8443334421 its reverse (1244333448), we get a palindrome (9687667869).

The spelling of 8443334421 in words is "eight billion, four hundred forty-three million, three hundred thirty-four thousand, four hundred twenty-one".