12786997 has 2 divisors, whose sum is σ = 12786998. Its totient is φ = 12786996.

The previous prime is 12786979. The next prime is 12787001. The reversal of 12786997 is 79968721.

It is a happy number.

12786997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (12786979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 106276 = 3561^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 12786997 - 2¹¹ = 12784949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12786997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12786937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6393498 + 6393499.

It is an arithmetic number, because the mean of its divisors is an integer number (6393499).

Almost surely, 2^12786997 is an apocalyptic number.

It is an amenable number.

12786997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12786997 is an equidigital number, since it uses as much as digits as its factorization.

12786997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 12786997 is about 3575.8910777595. The cubic root of 12786997 is about 233.8421817975.

The spelling of 12786997 in words is "twelve million, seven hundred eighty-six thousand, nine hundred ninety-seven".