12308843687989 has 2 divisors, whose sum is σ = 12308843687990. Its totient is φ = 12308843687988.

The previous prime is 12308843687957. The next prime is 12308843688049. The reversal of 12308843687989 is 98978634880321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12274042785489 + 34800902500 = 3503433^2 + 186550^2 .

It is a cyclic number.

It is not a de Polignac number, because 12308843687989 - 2⁵ = 12308843687957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12308843687089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154421843994 + 6154421843995.

It is an arithmetic number, because the mean of its divisors is an integer number (6154421843995).

Almost surely, 2^{12308843687989} is an apocalyptic number.

It is an amenable number.

12308843687989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12308843687989 is an equidigital number, since it uses as much as digits as its factorization.

12308843687989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003290624, while the sum is 76.

The spelling of 12308843687989 in words is "twelve trillion, three hundred eight billion, eight hundred forty-three million, six hundred eighty-seven thousand, nine hundred eighty-nine".