12786493 has 2 divisors, whose sum is σ = 12786494. Its totient is φ = 12786492.

The previous prime is 12786479. The next prime is 12786509. The reversal of 12786493 is 39468721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 20164 = 3573^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 12786493 - 2¹⁷ = 12655421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12783493) 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, 6393246 + 6393247.

It is an arithmetic number, because the mean of its divisors is an integer number (6393247).

Almost surely, 2^12786493 is an apocalyptic number.

It is an amenable number.

12786493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12786493 is an equidigital number, since it uses as much as digits as its factorization.

12786493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 12786493 is about 3575.8206051199. The cubic root of 12786493 is about 233.8391094575.

The spelling of 12786493 in words is "twelve million, seven hundred eighty-six thousand, four hundred ninety-three".