84864191 has 2 divisors, whose sum is σ = 84864192. Its totient is φ = 84864190.

The previous prime is 84864167. The next prime is 84864193. The reversal of 84864191 is 19146848.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84864191 - 2²² = 80669887 is a prime.

Together with 84864193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84864193) 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, 42432095 + 42432096.

It is an arithmetic number, because the mean of its divisors is an integer number (42432096).

Almost surely, 2^84864191 is an apocalyptic number.

84864191 is a deficient number, since it is larger than the sum of its proper divisors (1).

84864191 is an equidigital number, since it uses as much as digits as its factorization.

84864191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 41.

The square root of 84864191 is about 9212.1762358305. The cubic root of 84864191 is about 439.4486741393.

The spelling of 84864191 in words is "eighty-four million, eight hundred sixty-four thousand, one hundred ninety-one".