12378689 has 2 divisors, whose sum is σ = 12378690. Its totient is φ = 12378688.

The previous prime is 12378673. The next prime is 12378697. The reversal of 12378689 is 98687321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9048064 + 3330625 = 3008^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 12378689 - 2⁴ = 12378673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12378649) 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, 6189344 + 6189345.

It is an arithmetic number, because the mean of its divisors is an integer number (6189345).

Almost surely, 2^12378689 is an apocalyptic number.

It is an amenable number.

12378689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12378689 is an equidigital number, since it uses as much as digits as its factorization.

12378689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 12378689 is about 3518.3361124259. The cubic root of 12378689 is about 231.3262320865.

The spelling of 12378689 in words is "twelve million, three hundred seventy-eight thousand, six hundred eighty-nine".