12173869 has 4 divisors (see below), whose sum is σ = 12227260. Its totient is φ = 12120480.

The previous prime is 12173867. The next prime is 12173891. The reversal of 12173869 is 96837121.

12173869 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 9998244 + 2175625 = 3162^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 12173869 - 2¹ = 12173867 is a prime.

It is a super-2 number, since 2×12173869² = 296406172858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12173867) 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, 26352 + ... + 26809.

It is an arithmetic number, because the mean of its divisors is an integer number (3056815).

Almost surely, 2^12173869 is an apocalyptic number.

It is an amenable number.

12173869 is a deficient number, since it is larger than the sum of its proper divisors (53391).

12173869 is an equidigital number, since it uses as much as digits as its factorization.

12173869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53390.

The product of its digits is 18144, while the sum is 37.

The square root of 12173869 is about 3489.1071923918. The cubic root of 12173869 is about 230.0432747810.

The spelling of 12173869 in words is "twelve million, one hundred seventy-three thousand, eight hundred sixty-nine".