8221489 has 8 divisors (see below), whose sum is σ = 8730720. Its totient is φ = 7715136.

The previous prime is 8221487. The next prime is 8221513. The reversal of 8221489 is 9841228.

8221489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8221489 - 2¹ = 8221487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221487) 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, 9142 + ... + 10000.

It is an arithmetic number, because the mean of its divisors is an integer number (1091340).

Almost surely, 2^8221489 is an apocalyptic number.

It is an amenable number.

8221489 is a deficient number, since it is larger than the sum of its proper divisors (509231).

8221489 is a wasteful number, since it uses less digits than its factorization.

8221489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its digits is 9216, while the sum is 34.

The square root of 8221489 is about 2867.3138998024. The cubic root of 8221489 is about 201.8289651156.

The spelling of 8221489 in words is "eight million, two hundred twenty-one thousand, four hundred eighty-nine".