84173944861 has 4 divisors (see below), whose sum is σ = 84179800224. Its totient is φ = 84168089500.

The previous prime is 84173944831. The next prime is 84173944873. The reversal of 84173944861 is 16844937148.

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 a cyclic number.

It is not a de Polignac number, because 84173944861 - 2¹³ = 84173936669 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 (84173944831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2906065 + ... + 2934886.

It is an arithmetic number, because the mean of its divisors is an integer number (21044950056).

Almost surely, 2^84173944861 is an apocalyptic number.

It is an amenable number.

84173944861 is a deficient number, since it is larger than the sum of its proper divisors (5855363).

84173944861 is a wasteful number, since it uses less digits than its factorization.

84173944861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855362.

The product of its digits is 4644864, while the sum is 55.

The spelling of 84173944861 in words is "eighty-four billion, one hundred seventy-three million, nine hundred forty-four thousand, eight hundred sixty-one".