84444439 has 2 divisors, whose sum is σ = 84444440. Its totient is φ = 84444438.

The previous prime is 84444391. The next prime is 84444463. The reversal of 84444439 is 93444448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84444439 - 2¹⁷ = 84313367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84444469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42222219 + 42222220.

It is an arithmetic number, because the mean of its divisors is an integer number (42222220).

Almost surely, 2^84444439 is an apocalyptic number.

84444439 is a deficient number, since it is larger than the sum of its proper divisors (1).

84444439 is an equidigital number, since it uses as much as digits as its factorization.

84444439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 40.

The square root of 84444439 is about 9189.3655384907. The cubic root of 84444439 is about 438.7229482541.

Subtracting 84444439 from its reverse (93444448), we obtain a palindrome (9000009).

The spelling of 84444439 in words is "eighty-four million, four hundred forty-four thousand, four hundred thirty-nine".