8216789 has 4 divisors (see below), whose sum is σ = 9390624. Its totient is φ = 7042956.

The previous prime is 8216783. The next prime is 8216801. The reversal of 8216789 is 9876128.

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 a de Polignac number, because none of the positive numbers 2^k-8216789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216783) 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 3 ways as a sum of consecutive naturals, for example, 586907 + ... + 586920.

It is an arithmetic number, because the mean of its divisors is an integer number (2347656).

Almost surely, 2^8216789 is an apocalyptic number.

It is an amenable number.

8216789 is a deficient number, since it is larger than the sum of its proper divisors (1173835).

8216789 is a wasteful number, since it uses less digits than its factorization.

8216789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173834.

The product of its digits is 48384, while the sum is 41.

The square root of 8216789 is about 2866.4942002383. The cubic root of 8216789 is about 201.7904977546.

The spelling of 8216789 in words is "eight million, two hundred sixteen thousand, seven hundred eighty-nine".