12663173 has 4 divisors (see below), whose sum is σ = 12870828. Its totient is φ = 12455520.

The previous prime is 12663143. The next prime is 12663191. The reversal of 12663173 is 37136621.

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 5166529 + 7496644 = 2273^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 12663173 - 2¹⁰ = 12662149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663143) 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, 103736 + ... + 103857.

It is an arithmetic number, because the mean of its divisors is an integer number (3217707).

Almost surely, 2^12663173 is an apocalyptic number.

It is an amenable number.

12663173 is a deficient number, since it is larger than the sum of its proper divisors (207655).

12663173 is an equidigital number, since it uses as much as digits as its factorization.

12663173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207654.

The product of its digits is 4536, while the sum is 29.

The square root of 12663173 is about 3558.5352323674. The cubic root of 12663173 is about 233.0849217975.

Adding to 12663173 its reverse (37136621), we get a palindrome (49799794).

The spelling of 12663173 in words is "twelve million, six hundred sixty-three thousand, one hundred seventy-three".