12378169 has 2 divisors, whose sum is σ = 12378170. Its totient is φ = 12378168.

The previous prime is 12378167. The next prime is 12378173. The reversal of 12378169 is 96187321.

12378169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 2518569 = 3140^2 + 1587^2 .

It is a cyclic number.

It is not a de Polignac number, because 12378169 - 2¹ = 12378167 is a prime.

It is a super-2 number, since 2×12378169² = 306438135585122, which contains 22 as substring.

Together with 12378167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12378161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6189084 + 6189085.

It is an arithmetic number, because the mean of its divisors is an integer number (6189085).

Almost surely, 2^12378169 is an apocalyptic number.

It is an amenable number.

12378169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12378169 is an equidigital number, since it uses as much as digits as its factorization.

12378169 is an evil number, because the sum of its binary digits is even.

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

The square root of 12378169 is about 3518.2622130819. The cubic root of 12378169 is about 231.3229928818.

The spelling of 12378169 in words is "twelve million, three hundred seventy-eight thousand, one hundred sixty-nine".