43681213189 has 4 divisors (see below), whose sum is σ = 43949196256. Its totient is φ = 43413230124.

The previous prime is 43681213187. The next prime is 43681213201. The reversal of 43681213189 is 98131218634.

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 43681213189 - 2¹ = 43681213187 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 (43681213187) 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, 133991289 + ... + 133991614.

It is an arithmetic number, because the mean of its divisors is an integer number (10987299064).

Almost surely, 2^43681213189 is an apocalyptic number.

It is an amenable number.

43681213189 is a deficient number, since it is larger than the sum of its proper divisors (267983067).

43681213189 is a wasteful number, since it uses less digits than its factorization.

43681213189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267983066.

The product of its digits is 248832, while the sum is 46.

Subtracting 43681213189 from its reverse (98131218634), we obtain a palindrome (54450005445).

The spelling of 43681213189 in words is "forty-three billion, six hundred eighty-one million, two hundred thirteen thousand, one hundred eighty-nine".