84539391 has 8 divisors (see below), whose sum is σ = 113371440. Its totient is φ = 56033472.

The previous prime is 84539369. The next prime is 84539407. The reversal of 84539391 is 19393548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84539391 - 2⁵ = 84539359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84539491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80926 + ... + 81963.

It is an arithmetic number, because the mean of its divisors is an integer number (14171430).

Almost surely, 2^84539391 is an apocalyptic number.

84539391 is a deficient number, since it is larger than the sum of its proper divisors (28832049).

84539391 is a wasteful number, since it uses less digits than its factorization.

84539391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163065.

The product of its digits is 116640, while the sum is 42.

The square root of 84539391 is about 9194.5304937229. The cubic root of 84539391 is about 438.8873246492.

The spelling of 84539391 in words is "eighty-four million, five hundred thirty-nine thousand, three hundred ninety-one".