84223439 has 2 divisors, whose sum is σ = 84223440. Its totient is φ = 84223438.

The previous prime is 84223417. The next prime is 84223441. The reversal of 84223439 is 93432248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84223439 - 2¹⁶ = 84157903 is a prime.

Together with 84223441, 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 = 84223399 and 84223408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84223499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42111719 + 42111720.

It is an arithmetic number, because the mean of its divisors is an integer number (42111720).

Almost surely, 2^84223439 is an apocalyptic number.

84223439 is a deficient number, since it is larger than the sum of its proper divisors (1).

84223439 is an equidigital number, since it uses as much as digits as its factorization.

84223439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 84223439 is about 9177.3328914233. The cubic root of 84223439 is about 438.3398858175.

The spelling of 84223439 in words is "eighty-four million, two hundred twenty-three thousand, four hundred thirty-nine".