12003911 has 2 divisors, whose sum is σ = 12003912. Its totient is φ = 12003910.

The previous prime is 12003881. The next prime is 12003961. The reversal of 12003911 is 11930021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12003911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12003911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12003961) 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, 6001955 + 6001956.

It is an arithmetic number, because the mean of its divisors is an integer number (6001956).

Almost surely, 2^12003911 is an apocalyptic number.

12003911 is a deficient number, since it is larger than the sum of its proper divisors (1).

12003911 is an equidigital number, since it uses as much as digits as its factorization.

12003911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 12003911 is about 3464.6660733756. Note that the first 3 decimals coincide. The cubic root of 12003911 is about 228.9677179058.

Adding to 12003911 its reverse (11930021), we get a palindrome (23933932).

The spelling of 12003911 in words is "twelve million, three thousand, nine hundred eleven".