684000172189 has 4 divisors (see below), whose sum is σ = 700683103260. Its totient is φ = 667317241120.

The previous prime is 684000172169. The next prime is 684000172259. The reversal of 684000172189 is 981271000486.

684000172189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75483166564 + 608517005625 = 274742^2 + 780075^2 .

It is a cyclic number.

It is not a de Polignac number, because 684000172189 - 2¹⁵ = 684000139421 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 (684000172169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8341465474 + ... + 8341465555.

It is an arithmetic number, because the mean of its divisors is an integer number (175170775815).

Almost surely, 2^684000172189 is an apocalyptic number.

It is an amenable number.

684000172189 is a deficient number, since it is larger than the sum of its proper divisors (16682931071).

684000172189 is a wasteful number, since it uses less digits than its factorization.

684000172189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16682931070.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 684000172189 in words is "six hundred eighty-four billion, one hundred seventy-two thousand, one hundred eighty-nine".