84534785131 has 4 divisors (see below), whose sum is σ = 84545973064. Its totient is φ = 84523597200.

The previous prime is 84534785129. The next prime is 84534785149. The reversal of 84534785131 is 13158743548.

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 84534785131 - 2¹ = 84534785129 is a prime.

It is a super-2 number, since 2×84534785131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84534705131) 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, 5582625 + ... + 5597746.

It is an arithmetic number, because the mean of its divisors is an integer number (21136493266).

Almost surely, 2^84534785131 is an apocalyptic number.

84534785131 is a deficient number, since it is larger than the sum of its proper divisors (11187933).

84534785131 is a wasteful number, since it uses less digits than its factorization.

84534785131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11187932.

The product of its digits is 1612800, while the sum is 49.

The spelling of 84534785131 in words is "eighty-four billion, five hundred thirty-four million, seven hundred eighty-five thousand, one hundred thirty-one".