12746779 has 2 divisors, whose sum is σ = 12746780. Its totient is φ = 12746778.

The previous prime is 12746771. The next prime is 12746819. The reversal of 12746779 is 97764721.

It is a weak prime.

It is an emirp because it is prime and its reverse (97764721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12746779 - 2³ = 12746771 is a prime.

It is not a weakly prime, because it can be changed into another prime (12746771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6373389 + 6373390.

It is an arithmetic number, because the mean of its divisors is an integer number (6373390).

Almost surely, 2^12746779 is an apocalyptic number.

12746779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12746779 is an equidigital number, since it uses as much as digits as its factorization.

12746779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 43.

The square root of 12746779 is about 3570.2631555671. The cubic root of 12746779 is about 233.5967621193.

The spelling of 12746779 in words is "twelve million, seven hundred forty-six thousand, seven hundred seventy-nine".