84728871 has 6 divisors (see below), whose sum is σ = 122386160. Its totient is φ = 56485908.

The previous prime is 84728863. The next prime is 84728879. The reversal of 84728871 is 17882748.

It is an interprime number because it is at equal distance from previous prime (84728863) and next prime (84728879).

It is not a de Polignac number, because 84728871 - 2³ = 84728863 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 (84728879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4707151 + ... + 4707168.

Almost surely, 2^84728871 is an apocalyptic number.

84728871 is a deficient number, since it is larger than the sum of its proper divisors (37657289).

84728871 is a wasteful number, since it uses less digits than its factorization.

84728871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9414325 (or 9414322 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 84728871 is about 9204.8286784709. The cubic root of 84728871 is about 439.2149759244.

The spelling of 84728871 in words is "eighty-four million, seven hundred twenty-eight thousand, eight hundred seventy-one".