12700643 has 2 divisors, whose sum is σ = 12700644. Its totient is φ = 12700642.

The previous prime is 12700591. The next prime is 12700661. The reversal of 12700643 is 34600721.

It is a strong prime.

It is an emirp because it is prime and its reverse (34600721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12700643 - 2¹⁸ = 12438499 is a prime.

It is a super-2 number, since 2×12700643² = 322612665226898, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12700943) 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, 6350321 + 6350322.

It is an arithmetic number, because the mean of its divisors is an integer number (6350322).

Almost surely, 2^12700643 is an apocalyptic number.

12700643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12700643 is an equidigital number, since it uses as much as digits as its factorization.

12700643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 12700643 is about 3563.7961501747. The cubic root of 12700643 is about 233.3145928259.

The spelling of 12700643 in words is "twelve million, seven hundred thousand, six hundred forty-three".