8443381 has 4 divisors (see below), whose sum is σ = 8472492. Its totient is φ = 8414272.

The previous prime is 8443367. The next prime is 8443397. The reversal of 8443381 is 1833448.

8443381 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8071281 + 372100 = 2841^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 8443381 - 2⁵ = 8443349 is a prime.

It is a super-2 number, since 2×8443381² = 142581365422322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8443301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14116 + ... + 14701.

It is an arithmetic number, because the mean of its divisors is an integer number (2118123).

Almost surely, 2^8443381 is an apocalyptic number.

It is an amenable number.

8443381 is a deficient number, since it is larger than the sum of its proper divisors (29111).

8443381 is a wasteful number, since it uses less digits than its factorization.

8443381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29110.

The product of its digits is 9216, while the sum is 31.

The square root of 8443381 is about 2905.7496451002. The cubic root of 8443381 is about 203.6286094892.

It can be divided in two parts, 844 and 3381, that added together give a square (4225 = 65²).

The spelling of 8443381 in words is "eight million, four hundred forty-three thousand, three hundred eighty-one".