12147179189 has 4 divisors (see below), whose sum is σ = 12166995756. Its totient is φ = 12127362624.

The previous prime is 12147179171. The next prime is 12147179203. The reversal of 12147179189 is 98197174121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98197174121 = 128339 ⋅765139.

It can be written as a sum of positive squares in 2 ways, for example, as 52678564 + 12094500625 = 7258^2 + 109975^2 .

It is a cyclic number.

It is not a de Polignac number, because 12147179189 - 2¹² = 12147175093 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 (12147179489) 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, 9907364 + ... + 9908589.

It is an arithmetic number, because the mean of its divisors is an integer number (3041748939).

Almost surely, 2^12147179189 is an apocalyptic number.

It is an amenable number.

12147179189 is a deficient number, since it is larger than the sum of its proper divisors (19816567).

12147179189 is an equidigital number, since it uses as much as digits as its factorization.

12147179189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19816566.

The product of its digits is 254016, while the sum is 50.

The spelling of 12147179189 in words is "twelve billion, one hundred forty-seven million, one hundred seventy-nine thousand, one hundred eighty-nine".