12308981 has 2 divisors, whose sum is σ = 12308982. Its totient is φ = 12308980.

The previous prime is 12308951. The next prime is 12308987. The reversal of 12308981 is 18980321.

12308981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 128881 = 3490^2 + 359^2 .

It is an emirp because it is prime and its reverse (18980321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12308981 - 2¹⁰ = 12307957 is a prime.

It is a super-2 number, since 2×12308981² = 303022026516722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12308987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154490 + 6154491.

It is an arithmetic number, because the mean of its divisors is an integer number (6154491).

Almost surely, 2^12308981 is an apocalyptic number.

It is an amenable number.

12308981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12308981 is an equidigital number, since it uses as much as digits as its factorization.

12308981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12308981 is about 3508.4157393331. The cubic root of 12308981 is about 230.8911926740.

The spelling of 12308981 in words is "twelve million, three hundred eight thousand, nine hundred eighty-one".