84385439 has 4 divisors (see below), whose sum is σ = 85333680. Its totient is φ = 83437200.

The previous prime is 84385429. The next prime is 84385453. The reversal of 84385439 is 93458348.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84385439 - 2²⁴ = 67608223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84385439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84385409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473987 + ... + 474164.

It is an arithmetic number, because the mean of its divisors is an integer number (21333420).

Almost surely, 2^84385439 is an apocalyptic number.

84385439 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

84385439 is a deficient number, since it is larger than the sum of its proper divisors (948241).

84385439 is an equidigital number, since it uses as much as digits as its factorization.

84385439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948240.

The product of its digits is 414720, while the sum is 44.

The square root of 84385439 is about 9186.1547450497. The cubic root of 84385439 is about 438.6207481763.

The spelling of 84385439 in words is "eighty-four million, three hundred eighty-five thousand, four hundred thirty-nine".