30120191 has 2 divisors, whose sum is σ = 30120192. Its totient is φ = 30120190.

The previous prime is 30120173. The next prime is 30120197. The reversal of 30120191 is 19102103.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30120191 - 2¹⁴ = 30103807 is a 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 (30120197) 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, 15060095 + 15060096.

It is an arithmetic number, because the mean of its divisors is an integer number (15060096).

Almost surely, 2^30120191 is an apocalyptic number.

30120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

30120191 is an equidigital number, since it uses as much as digits as its factorization.

30120191 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 30120191 is about 5488.1864946447. The cubic root of 30120191 is about 311.1376547600.

Adding to 30120191 its reverse (19102103), we get a palindrome (49222294).

The spelling of 30120191 in words is "thirty million, one hundred twenty thousand, one hundred ninety-one".