8247389 has 4 divisors (see below), whose sum is σ = 8273724. Its totient is φ = 8221056.

The previous prime is 8247377. The next prime is 8247391. The reversal of 8247389 is 9837428.

8247389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3003289 + 5244100 = 1733^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 8247389 - 2⁴ = 8247373 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 (8247319) 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, 12692 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (2068431).

Almost surely, 2^8247389 is an apocalyptic number.

It is an amenable number.

8247389 is a deficient number, since it is larger than the sum of its proper divisors (26335).

8247389 is a wasteful number, since it uses less digits than its factorization.

8247389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26334.

The product of its digits is 96768, while the sum is 41.

The square root of 8247389 is about 2871.8267705417. The cubic root of 8247389 is about 202.0406822613.

The spelling of 8247389 in words is "eight million, two hundred forty-seven thousand, three hundred eighty-nine".