8210989 has 4 divisors (see below), whose sum is σ = 8219740. Its totient is φ = 8202240.

The previous prime is 8210987. The next prime is 8211011. The reversal of 8210989 is 9890128.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4818025 + 3392964 = 2195^2 + 1842^2 .

It is a cyclic number.

It is not a de Polignac number, because 8210989 - 2¹ = 8210987 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 (8210987) 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, 2772 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (2054935).

Almost surely, 2^8210989 is an apocalyptic number.

It is an amenable number.

8210989 is a deficient number, since it is larger than the sum of its proper divisors (8751).

8210989 is a wasteful number, since it uses less digits than its factorization.

8210989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 8210989 is about 2865.4823328717. The cubic root of 8210989 is about 201.7430071685.

The spelling of 8210989 in words is "eight million, two hundred ten thousand, nine hundred eighty-nine".