12780629 has 2 divisors, whose sum is σ = 12780630. Its totient is φ = 12780628.

The previous prime is 12780613. The next prime is 12780637. The reversal of 12780629 is 92608721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 4 = 3575^2 + 2^2 .

It is an emirp because it is prime and its reverse (92608721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12780629 - 2⁴ = 12780613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12780689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390314 + 6390315.

It is an arithmetic number, because the mean of its divisors is an integer number (6390315).

Almost surely, 2^12780629 is an apocalyptic number.

It is an amenable number.

12780629 is a deficient number, since it is larger than the sum of its proper divisors (1).

12780629 is an equidigital number, since it uses as much as digits as its factorization.

12780629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 12780629 is about 3575.0005594405. Note that the first 3 decimals coincide. The cubic root of 12780629 is about 233.8033570894.

The spelling of 12780629 in words is "twelve million, seven hundred eighty thousand, six hundred twenty-nine".