8219689 has 9 divisors (see below), whose sum is σ = 8538231. Its totient is φ = 7912920.

The previous prime is 8219657. The next prime is 8219711. The reversal of 8219689 is 9869128.

It is a happy number.

The square root of 8219689 is 2867.

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

It can be written as a sum of positive squares in only one way, i.e., 267289 + 7952400 = 517^2 + 2820^2 .

It is not a de Polignac number, because 8219689 - 2⁵ = 8219657 is a prime.

Its product of digits (62208) is a multiple of the sum of its prime divisors (108).

It is not an unprimeable number, because it can be changed into a prime (8211689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134719 + ... + 134779.

Almost surely, 2^8219689 is an apocalyptic number.

8219689 is the 2867-th square number.

8219689 is the 1434-th centered octagonal number.

It is an amenable number.

8219689 is a deficient number, since it is larger than the sum of its proper divisors (318542).

8219689 is an frugal number, since it uses more digits than its factorization.

8219689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 108 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The cubic root of 8219689 is about 201.8142346674.

The spelling of 8219689 in words is "eight million, two hundred nineteen thousand, six hundred eighty-nine".