986191 has 2 divisors, whose sum is σ = 986192. Its totient is φ = 986190.

The previous prime is 986189. The next prime is 986197. The reversal of 986191 is 191689.

It is a weak prime.

It is an emirp because it is prime and its reverse (191689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 986191 - 2¹ = 986189 is a prime.

Together with 986189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493095 + 493096.

It is an arithmetic number, because the mean of its divisors is an integer number (493096).

2⁹⁸⁶¹⁹¹ is an apocalyptic number.

986191 is a deficient number, since it is larger than the sum of its proper divisors (1).

986191 is an equidigital number, since it uses as much as digits as its factorization.

986191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 986191 is about 993.0714979295. The cubic root of 986191 is about 99.5375648335.

The spelling of 986191 in words is "nine hundred eighty-six thousand, one hundred ninety-one".