84421891173 has 4 divisors (see below), whose sum is σ = 112562521568. Its totient is φ = 56281260780.

The previous prime is 84421891171. The next prime is 84421891181. The reversal of 84421891173 is 37119812448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 84421891173 - 2¹ = 84421891171 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 (84421891171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14070315193 + ... + 14070315198.

It is an arithmetic number, because the mean of its divisors is an integer number (28140630392).

Almost surely, 2^84421891173 is an apocalyptic number.

It is an amenable number.

84421891173 is a deficient number, since it is larger than the sum of its proper divisors (28140630395).

84421891173 is a wasteful number, since it uses less digits than its factorization.

84421891173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28140630394.

The product of its digits is 387072, while the sum is 48.

The spelling of 84421891173 in words is "eighty-four billion, four hundred twenty-one million, eight hundred ninety-one thousand, one hundred seventy-three".