28200191 has 2 divisors, whose sum is σ = 28200192. Its totient is φ = 28200190.

The previous prime is 28200157. The next prime is 28200203. The reversal of 28200191 is 19100282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28200191 - 2¹⁸ = 27938047 is a prime.

It is a Chen prime.

It is equal to p_1753070 and since 28200191 and 1753070 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28220191) 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, 14100095 + 14100096.

It is an arithmetic number, because the mean of its divisors is an integer number (14100096).

Almost surely, 2^28200191 is an apocalyptic number.

28200191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28200191 is an equidigital number, since it uses as much as digits as its factorization.

28200191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 28200191 is about 5310.3852026007. The cubic root of 28200191 is about 304.3808671307.

Subtracting from 28200191 its reverse (19100282), we obtain a palindrome (9099909).

The spelling of 28200191 in words is "twenty-eight million, two hundred thousand, one hundred ninety-one".