12347432161 has 3 divisors (see below), whose sum is σ = 12347543281. Its totient is φ = 12347321042.

The previous prime is 12347432159. The next prime is 12347432179. The reversal of 12347432161 is 16123474321.

The square root of 12347432161 is 111119.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16123474321 = 1699 ⋅9489979.

It is not a de Polignac number, because 12347432161 - 2¹ = 12347432159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12347472161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55560 + ... + 166678.

Almost surely, 2^12347432161 is an apocalyptic number.

12347432161 is the 111119-th square number.

12347432161 is the 55560-th centered octagonal number.

It is an amenable number.

12347432161 is a deficient number, since it is larger than the sum of its proper divisors (111120).

12347432161 is an frugal number, since it uses more digits than its factorization.

12347432161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222238 (or 111119 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The spelling of 12347432161 in words is "twelve billion, three hundred forty-seven million, four hundred thirty-two thousand, one hundred sixty-one".