12728707 has 2 divisors, whose sum is σ = 12728708. Its totient is φ = 12728706.

The previous prime is 12728663. The next prime is 12728711. The reversal of 12728707 is 70782721.

It is a strong prime.

It is an emirp because it is prime and its reverse (70782721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12728707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12728747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364353 + 6364354.

It is an arithmetic number, because the mean of its divisors is an integer number (6364354).

Almost surely, 2^12728707 is an apocalyptic number.

12728707 is a deficient number, since it is larger than the sum of its proper divisors (1).

12728707 is an equidigital number, since it uses as much as digits as its factorization.

12728707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 12728707 is about 3567.7313519939. The cubic root of 12728707 is about 233.4863144178.

The spelling of 12728707 in words is "twelve million, seven hundred twenty-eight thousand, seven hundred seven".