84412439 has 2 divisors, whose sum is σ = 84412440. Its totient is φ = 84412438.

The previous prime is 84412357. The next prime is 84412441. The reversal of 84412439 is 93421448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84412439 - 2⁸ = 84412183 is a prime.

Together with 84412441, 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 = 84412399 and 84412408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84412499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42206219 + 42206220.

It is an arithmetic number, because the mean of its divisors is an integer number (42206220).

Almost surely, 2^84412439 is an apocalyptic number.

84412439 is a deficient number, since it is larger than the sum of its proper divisors (1).

84412439 is an equidigital number, since it uses as much as digits as its factorization.

84412439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 84412439 is about 9187.6242304526. The cubic root of 84412439 is about 438.6675236133.

Subtracting 84412439 from its reverse (93421448), we obtain a palindrome (9009009).

The spelling of 84412439 in words is "eighty-four million, four hundred twelve thousand, four hundred thirty-nine".