84321871 has 4 divisors (see below), whose sum is σ = 86378544. Its totient is φ = 82265200.

The previous prime is 84321869. The next prime is 84321889. The reversal of 84321871 is 17812348.

It is a happy number.

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 84321871 - 2¹ = 84321869 is a prime.

It is a super-3 number, since 3×84321871³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84321371) 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 3 ways as a sum of consecutive naturals, for example, 1028275 + ... + 1028356.

It is an arithmetic number, because the mean of its divisors is an integer number (21594636).

Almost surely, 2^84321871 is an apocalyptic number.

84321871 is a deficient number, since it is larger than the sum of its proper divisors (2056673).

84321871 is a wasteful number, since it uses less digits than its factorization.

84321871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056672.

The product of its digits is 10752, while the sum is 34.

The square root of 84321871 is about 9182.6941035842. The cubic root of 84321871 is about 438.5105820613.

The spelling of 84321871 in words is "eighty-four million, three hundred twenty-one thousand, eight hundred seventy-one".