84456871 has 4 divisors (see below), whose sum is σ = 84483000. Its totient is φ = 84430744.

The previous prime is 84456863. The next prime is 84456877. The reversal of 84456871 is 17865448.

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 84456871 - 2³ = 84456863 is a prime.

It is a super-2 number, since 2×84456871² = 14265926118221282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84456877) 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, 7396 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (21120750).

Almost surely, 2^84456871 is an apocalyptic number.

84456871 is a deficient number, since it is larger than the sum of its proper divisors (26129).

84456871 is a wasteful number, since it uses less digits than its factorization.

84456871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26128.

The product of its digits is 215040, while the sum is 43.

The square root of 84456871 is about 9190.0419476736. The cubic root of 84456871 is about 438.7444769504.

The spelling of 84456871 in words is "eighty-four million, four hundred fifty-six thousand, eight hundred seventy-one".