28343191 has 2 divisors, whose sum is σ = 28343192. Its totient is φ = 28343190.

The previous prime is 28343167. The next prime is 28343197. The reversal of 28343191 is 19134382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28343191 - 2⁹ = 28342679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28343197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14171595 + 14171596.

It is an arithmetic number, because the mean of its divisors is an integer number (14171596).

Almost surely, 2^28343191 is an apocalyptic number.

28343191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28343191 is an equidigital number, since it uses as much as digits as its factorization.

28343191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 28343191 is about 5323.8323602458. The cubic root of 28343191 is about 304.8944936514.

The spelling of 28343191 in words is "twenty-eight million, three hundred forty-three thousand, one hundred ninety-one".