8394439 has 2 divisors, whose sum is σ = 8394440. Its totient is φ = 8394438.

The previous prime is 8394437. The next prime is 8394467. The reversal of 8394439 is 9344938.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8394439 - 2¹ = 8394437 is a prime.

It is a super-2 number, since 2×8394439² = 140933212249442, which contains 22 as substring.

Together with 8394437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8394433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4197219 + 4197220.

It is an arithmetic number, because the mean of its divisors is an integer number (4197220).

Almost surely, 2^8394439 is an apocalyptic number.

8394439 is a deficient number, since it is larger than the sum of its proper divisors (1).

8394439 is an equidigital number, since it uses as much as digits as its factorization.

8394439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 8394439 is about 2897.3158267610. The cubic root of 8394439 is about 203.2344028876.

The spelling of 8394439 in words is "eight million, three hundred ninety-four thousand, four hundred thirty-nine".