8212399 has 4 divisors (see below), whose sum is σ = 8844136. Its totient is φ = 7580664.

The previous prime is 8212397. The next prime is 8212439. The reversal of 8212399 is 9932128.

8212399 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 is not a de Polignac number, because 8212399 - 2¹ = 8212397 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315849 + ... + 315874.

It is an arithmetic number, because the mean of its divisors is an integer number (2211034).

Almost surely, 2^8212399 is an apocalyptic number.

8212399 is a deficient number, since it is larger than the sum of its proper divisors (631737).

8212399 is a wasteful number, since it uses less digits than its factorization.

8212399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631736.

The product of its digits is 7776, while the sum is 34.

The square root of 8212399 is about 2865.7283541885. The cubic root of 8212399 is about 201.7545543508.

The spelling of 8212399 in words is "eight million, two hundred twelve thousand, three hundred ninety-nine".