84816871 has 4 divisors (see below), whose sum is σ = 85656744. Its totient is φ = 83977000.

The previous prime is 84816857. The next prime is 84816881. The reversal of 84816871 is 17861848.

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 84816871 - 2¹⁵ = 84784103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84816881) 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, 419785 + ... + 419986.

It is an arithmetic number, because the mean of its divisors is an integer number (21414186).

Almost surely, 2^84816871 is an apocalyptic number.

84816871 is a deficient number, since it is larger than the sum of its proper divisors (839873).

84816871 is a wasteful number, since it uses less digits than its factorization.

84816871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839872.

The product of its digits is 86016, while the sum is 43.

The square root of 84816871 is about 9209.6075377836. The cubic root of 84816871 is about 439.3669805642.

The spelling of 84816871 in words is "eighty-four million, eight hundred sixteen thousand, eight hundred seventy-one".