12678173 has 2 divisors, whose sum is σ = 12678174. Its totient is φ = 12678172.

The previous prime is 12678151. The next prime is 12678181. The reversal of 12678173 is 37187621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 3545689 = 3022^2 + 1883^2 .

It is an emirp because it is prime and its reverse (37187621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12678173 - 2¹⁰ = 12677149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12678103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6339086 + 6339087.

It is an arithmetic number, because the mean of its divisors is an integer number (6339087).

Almost surely, 2^12678173 is an apocalyptic number.

It is an amenable number.

12678173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12678173 is an equidigital number, since it uses as much as digits as its factorization.

12678173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 12678173 is about 3560.6422173535. The cubic root of 12678173 is about 233.1769180728.

The spelling of 12678173 in words is "twelve million, six hundred seventy-eight thousand, one hundred seventy-three".