8212394439 has 16 divisors (see below), whose sum is σ = 12192806400. Its totient is φ = 5463096408.

The previous prime is 8212394401. The next prime is 8212394447. The reversal of 8212394439 is 9344932128.

8212394439 is a `hidden beast` number, since 8 + 2 + 123 + 94 + 439 = 666.

It is not a de Polignac number, because 8212394439 - 2²¹ = 8210297287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8212394394 and 8212394403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8217394439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315969 + ... + 340970.

It is an arithmetic number, because the mean of its divisors is an integer number (762050400).

Almost surely, 2^8212394439 is an apocalyptic number.

8212394439 is a deficient number, since it is larger than the sum of its proper divisors (3980411961).

8212394439 is a wasteful number, since it uses less digits than its factorization.

8212394439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657411 (or 657405 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 8212394439 is about 90622.2623807197. The cubic root of 8212394439 is about 2017.5451700062.

The spelling of 8212394439 in words is "eight billion, two hundred twelve million, three hundred ninety-four thousand, four hundred thirty-nine".