8209085191 has 2 divisors, whose sum is σ = 8209085192. Its totient is φ = 8209085190.

The previous prime is 8209085167. The next prime is 8209085201. The reversal of 8209085191 is 1915809028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8209085191 - 2¹³ = 8209076999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8209025191) 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, 4104542595 + 4104542596.

It is an arithmetic number, because the mean of its divisors is an integer number (4104542596).

Almost surely, 2^8209085191 is an apocalyptic number.

8209085191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8209085191 is an equidigital number, since it uses as much as digits as its factorization.

8209085191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 8209085191 is about 90604.0020694450. The cubic root of 8209085191 is about 2017.2741384429.

It can be divided in two parts, 82090 and 85191, that added together give a square (167281 = 409²).

The spelling of 8209085191 in words is "eight billion, two hundred nine million, eighty-five thousand, one hundred ninety-one".