12000078689 has 2 divisors, whose sum is σ = 12000078690. Its totient is φ = 12000078688.

The previous prime is 12000078611. The next prime is 12000078733. The reversal of 12000078689 is 98687000021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11999011600 + 1067089 = 109540^2 + 1033^2 .

It is an emirp because it is prime and its reverse (98687000021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12000078689 is a prime.

It is not a weakly prime, because it can be changed into another prime (12000078989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000039344 + 6000039345.

It is an arithmetic number, because the mean of its divisors is an integer number (6000039345).

Almost surely, 2^12000078689 is an apocalyptic number.

It is an amenable number.

12000078689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000078689 is an equidigital number, since it uses as much as digits as its factorization.

12000078689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 12000078689 in words is "twelve billion, seventy-eight thousand, six hundred eighty-nine".