84859495847 has 4 divisors (see below), whose sum is σ = 96982280976. Its totient is φ = 72736710720.

The previous prime is 84859495829. The next prime is 84859495849. The reversal of 84859495847 is 74859495848.

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 84859495847 - 2⁶ = 84859495783 is a prime.

It is a super-2 number, since 2×84859495847² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84859495849) 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, 6061392554 + ... + 6061392567.

It is an arithmetic number, because the mean of its divisors is an integer number (24245570244).

Almost surely, 2^84859495847 is an apocalyptic number.

84859495847 is a deficient number, since it is larger than the sum of its proper divisors (12122785129).

84859495847 is a wasteful number, since it uses less digits than its factorization.

84859495847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12122785128.

The product of its digits is 464486400, while the sum is 71.

Subtracting from 84859495847 its reverse (74859495848), we obtain a palindrome (9999999999).

The spelling of 84859495847 in words is "eighty-four billion, eight hundred fifty-nine million, four hundred ninety-five thousand, eight hundred forty-seven".