84356539 has 4 divisors (see below), whose sum is σ = 84631624. Its totient is φ = 84081456.

The previous prime is 84356527. The next prime is 84356579. The reversal of 84356539 is 93565348.

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 84356539 - 2²⁵ = 50802107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84356495 and 84356504.

It is not an unprimeable number, because it can be changed into a prime (84356509) 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, 137082 + ... + 137695.

It is an arithmetic number, because the mean of its divisors is an integer number (21157906).

Almost surely, 2^84356539 is an apocalyptic number.

84356539 is a deficient number, since it is larger than the sum of its proper divisors (275085).

84356539 is a wasteful number, since it uses less digits than its factorization.

84356539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275084.

The product of its digits is 388800, while the sum is 43.

The square root of 84356539 is about 9184.5815909055. The cubic root of 84356539 is about 438.5706700778.

The spelling of 84356539 in words is "eighty-four million, three hundred fifty-six thousand, five hundred thirty-nine".