30013903 has 2 divisors, whose sum is σ = 30013904. Its totient is φ = 30013902.

The previous prime is 30013861. The next prime is 30013909. The reversal of 30013903 is 30931003.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30013903 - 2⁹ = 30013391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30013909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15006951 + 15006952.

It is an arithmetic number, because the mean of its divisors is an integer number (15006952).

Almost surely, 2^30013903 is an apocalyptic number.

30013903 is a deficient number, since it is larger than the sum of its proper divisors (1).

30013903 is an equidigital number, since it uses as much as digits as its factorization.

30013903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 30013903 is about 5478.4945924953. The cubic root of 30013903 is about 310.7712430196.

Adding to 30013903 its reverse (30931003), we get a palindrome (60944906).

The spelling of 30013903 in words is "thirty million, thirteen thousand, nine hundred three".