84393539 has 4 divisors (see below), whose sum is σ = 86451960. Its totient is φ = 82335120.

The previous prime is 84393521. The next prime is 84393553. The reversal of 84393539 is 93539348.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84393539 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 84393539.

It is not an unprimeable number, because it can be changed into a prime (84398539) 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, 1029149 + ... + 1029230.

It is an arithmetic number, because the mean of its divisors is an integer number (21612990).

Almost surely, 2^84393539 is an apocalyptic number.

84393539 is a deficient number, since it is larger than the sum of its proper divisors (2058421).

84393539 is a wasteful number, since it uses less digits than its factorization.

84393539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058420.

The product of its digits is 349920, while the sum is 44.

The square root of 84393539 is about 9186.5956153518. The cubic root of 84393539 is about 438.6347818549.

The spelling of 84393539 in words is "eighty-four million, three hundred ninety-three thousand, five hundred thirty-nine".