12945983 has 2 divisors, whose sum is σ = 12945984. Its totient is φ = 12945982.

The previous prime is 12945979. The next prime is 12946001. The reversal of 12945983 is 38954921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12945983 - 2² = 12945979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12945983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12945923) 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, 6472991 + 6472992.

It is an arithmetic number, because the mean of its divisors is an integer number (6472992).

Almost surely, 2^12945983 is an apocalyptic number.

12945983 is a deficient number, since it is larger than the sum of its proper divisors (1).

12945983 is an equidigital number, since it uses as much as digits as its factorization.

12945983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 12945983 is about 3598.0526677635. The cubic root of 12945983 is about 234.8073447432.

The spelling of 12945983 in words is "twelve million, nine hundred forty-five thousand, nine hundred eighty-three".