84686439 has 16 divisors (see below), whose sum is σ = 119059200. Its totient is φ = 53395776.

The previous prime is 84686423. The next prime is 84686447. The reversal of 84686439 is 93468648.

It is not a de Polignac number, because 84686439 - 2⁴ = 84686423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84686449) 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 in 15 ways as a sum of consecutive naturals, for example, 53542 + ... + 55100.

It is an arithmetic number, because the mean of its divisors is an integer number (7441200).

Almost surely, 2^84686439 is an apocalyptic number.

84686439 is a deficient number, since it is larger than the sum of its proper divisors (34372761).

84686439 is a wasteful number, since it uses less digits than its factorization.

84686439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534.

The product of its digits is 995328, while the sum is 48.

The square root of 84686439 is about 9202.5235126024. The cubic root of 84686439 is about 439.1416444394.

The spelling of 84686439 in words is "eighty-four million, six hundred eighty-six thousand, four hundred thirty-nine".