12378173 has 2 divisors, whose sum is σ = 12378174. Its totient is φ = 12378172.

The previous prime is 12378169. The next prime is 12378199. The reversal of 12378173 is 37187321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12376324 + 1849 = 3518^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 12378173 - 2² = 12378169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12378103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6189086 + 6189087.

It is an arithmetic number, because the mean of its divisors is an integer number (6189087).

Almost surely, 2^12378173 is an apocalyptic number.

It is an amenable number.

12378173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12378173 is an equidigital number, since it uses as much as digits as its factorization.

12378173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 12378173 is about 3518.2627815443. The cubic root of 12378173 is about 231.3230177991.

The spelling of 12378173 in words is "twelve million, three hundred seventy-eight thousand, one hundred seventy-three".