12043643 has 2 divisors, whose sum is σ = 12043644. Its totient is φ = 12043642.

The previous prime is 12043639. The next prime is 12043693. The reversal of 12043643 is 34634021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12043643 - 2² = 12043639 is a prime.

It is a super-2 number, since 2×12043643² = 290098673422898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12043693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021821 + 6021822.

It is an arithmetic number, because the mean of its divisors is an integer number (6021822).

Almost surely, 2^12043643 is an apocalyptic number.

12043643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12043643 is an equidigital number, since it uses as much as digits as its factorization.

12043643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 12043643 is about 3470.3952224495. The cubic root of 12043643 is about 229.2200614022.

Adding to 12043643 its reverse (34634021), we get a palindrome (46677664).

The spelling of 12043643 in words is "twelve million, forty-three thousand, six hundred forty-three".