8021189 has 4 divisors (see below), whose sum is σ = 8750400. Its totient is φ = 7291980.

The previous prime is 8021171. The next prime is 8021191. The reversal of 8021189 is 9811208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8021189 - 2⁸ = 8020933 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021129) 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, 364589 + ... + 364610.

It is an arithmetic number, because the mean of its divisors is an integer number (2187600).

Almost surely, 2^8021189 is an apocalyptic number.

It is an amenable number.

8021189 is a deficient number, since it is larger than the sum of its proper divisors (729211).

8021189 is a wasteful number, since it uses less digits than its factorization.

8021189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729210.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 8021189 is about 2832.1703691692. The cubic root of 8021189 is about 200.1764193353.

It can be divided in two parts, 802 and 1189, that added together give a palindrome (1991).

The spelling of 8021189 in words is "eight million, twenty-one thousand, one hundred eighty-nine".