84861811 has 2 divisors, whose sum is σ = 84861812. Its totient is φ = 84861810.

The previous prime is 84861779. The next prime is 84861817. The reversal of 84861811 is 11816848.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84861811 - 2⁵ = 84861779 is a prime.

It is not a weakly prime, because it can be changed into another prime (84861817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42430905 + 42430906.

It is an arithmetic number, because the mean of its divisors is an integer number (42430906).

Almost surely, 2^84861811 is an apocalyptic number.

84861811 is a deficient number, since it is larger than the sum of its proper divisors (1).

84861811 is an equidigital number, since it uses as much as digits as its factorization.

84861811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 37.

The square root of 84861811 is about 9212.0470580648. The cubic root of 84861811 is about 439.4445660162. Note that the first 3 decimals are identical.

The spelling of 84861811 in words is "eighty-four million, eight hundred sixty-one thousand, eight hundred eleven".