84543887 has 2 divisors, whose sum is σ = 84543888. Its totient is φ = 84543886.

The previous prime is 84543881. The next prime is 84543911. The reversal of 84543887 is 78834548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84543887 - 2⁴ = 84543871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84543881) 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, 42271943 + 42271944.

It is an arithmetic number, because the mean of its divisors is an integer number (42271944).

Almost surely, 2^84543887 is an apocalyptic number.

84543887 is a deficient number, since it is larger than the sum of its proper divisors (1).

84543887 is an equidigital number, since it uses as much as digits as its factorization.

84543887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 47.

The square root of 84543887 is about 9194.7749836524. The cubic root of 84543887 is about 438.8951048583.

The spelling of 84543887 in words is "eighty-four million, five hundred forty-three thousand, eight hundred eighty-seven".