12011903 has 2 divisors, whose sum is σ = 12011904. Its totient is φ = 12011902.

The previous prime is 12011873. The next prime is 12011917. The reversal of 12011903 is 30911021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12011903 - 2²² = 7817599 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005951 + 6005952.

It is an arithmetic number, because the mean of its divisors is an integer number (6005952).

Almost surely, 2^12011903 is an apocalyptic number.

12011903 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011903 is an equidigital number, since it uses as much as digits as its factorization.

12011903 is an evil number, because the sum of its binary digits is even.

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

The square root of 12011903 is about 3465.8192393718. The cubic root of 12011903 is about 229.0185209050.

Adding to 12011903 its reverse (30911021), we get a palindrome (42922924).

The spelling of 12011903 in words is "twelve million, eleven thousand, nine hundred three".