84971863 has 4 divisors (see below), whose sum is σ = 85043128. Its totient is φ = 84900600.

The previous prime is 84971851. The next prime is 84971893. The reversal of 84971863 is 36817948.

It is a happy number.

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-84971863 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 (84971833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33813 + ... + 36238.

It is an arithmetic number, because the mean of its divisors is an integer number (21260782).

Almost surely, 2^84971863 is an apocalyptic number.

84971863 is a deficient number, since it is larger than the sum of its proper divisors (71265).

84971863 is a wasteful number, since it uses less digits than its factorization.

84971863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71264.

The product of its digits is 290304, while the sum is 46.

The square root of 84971863 is about 9218.0183879183. The cubic root of 84971863 is about 439.6344467257.

The spelling of 84971863 in words is "eighty-four million, nine hundred seventy-one thousand, eight hundred sixty-three".