12609643 has 2 divisors, whose sum is σ = 12609644. Its totient is φ = 12609642.

The previous prime is 12609613. The next prime is 12609647. The reversal of 12609643 is 34690621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12609643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12609647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6304821 + 6304822.

It is an arithmetic number, because the mean of its divisors is an integer number (6304822).

Almost surely, 2^12609643 is an apocalyptic number.

12609643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12609643 is an equidigital number, since it uses as much as digits as its factorization.

12609643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 12609643 is about 3551.0059138222. The cubic root of 12609643 is about 232.7560242845.

The spelling of 12609643 in words is "twelve million, six hundred nine thousand, six hundred forty-three".