1683121188 has 72 divisors (see below), whose sum is σ = 4577698272. Its totient is φ = 479920896.

The previous prime is 1683121133. The next prime is 1683121189. The reversal of 1683121188 is 8811213861.

It is not an unprimeable number, because it can be changed into a prime (1683121189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319020 + ... + 324252.

Almost surely, 2^1683121188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1683121188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288849136).

1683121188 is an abundant number, since it is smaller than the sum of its proper divisors (2894577084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1683121188 is a wasteful number, since it uses less digits than its factorization.

1683121188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801 (or 5792 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The square root of 1683121188 is about 41025.8599909862. The cubic root of 1683121188 is about 1189.5201294697.

The spelling of 1683121188 in words is "one billion, six hundred eighty-three million, one hundred twenty-one thousand, one hundred eighty-eight".