12009643 has 2 divisors, whose sum is σ = 12009644. Its totient is φ = 12009642.

The previous prime is 12009637. The next prime is 12009707. The reversal of 12009643 is 34690021.

12009643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12009643 - 2²¹ = 9912491 is a prime.

It is a super-3 number, since 3×12009643³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12009623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004821 + 6004822.

It is an arithmetic number, because the mean of its divisors is an integer number (6004822).

Almost surely, 2^12009643 is an apocalyptic number.

12009643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12009643 is an equidigital number, since it uses as much as digits as its factorization.

12009643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 12009643 is about 3465.4931827952. The cubic root of 12009643 is about 229.0041569772.

Adding to 12009643 its reverse (34690021), we get a palindrome (46699664).

The spelling of 12009643 in words is "twelve million, nine thousand, six hundred forty-three".