82678439 has 2 divisors, whose sum is σ = 82678440. Its totient is φ = 82678438.

The previous prime is 82678433. The next prime is 82678441. The reversal of 82678439 is 93487628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82678439 - 2¹² = 82674343 is a prime.

Together with 82678441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82678393 and 82678402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82678433) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41339219 + 41339220.

It is an arithmetic number, because the mean of its divisors is an integer number (41339220).

Almost surely, 2^82678439 is an apocalyptic number.

82678439 is a deficient number, since it is larger than the sum of its proper divisors (1).

82678439 is an equidigital number, since it uses as much as digits as its factorization.

82678439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 82678439 is about 9092.7685002974. The cubic root of 82678439 is about 435.6430160852.

The spelling of 82678439 in words is "eighty-two million, six hundred seventy-eight thousand, four hundred thirty-nine".