12378787 has 2 divisors, whose sum is σ = 12378788. Its totient is φ = 12378786.

The previous prime is 12378781. The next prime is 12378799. The reversal of 12378787 is 78787321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12378787 - 2¹¹ = 12376739 is a prime.

It is not a weakly prime, because it can be changed into another prime (12378781) 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, 6189393 + 6189394.

It is an arithmetic number, because the mean of its divisors is an integer number (6189394).

Almost surely, 2^12378787 is an apocalyptic number.

12378787 is a deficient number, since it is larger than the sum of its proper divisors (1).

12378787 is an equidigital number, since it uses as much as digits as its factorization.

12378787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 43.

The square root of 12378787 is about 3518.3500394361. The cubic root of 12378787 is about 231.3268425419.

The spelling of 12378787 in words is "twelve million, three hundred seventy-eight thousand, seven hundred eighty-seven".