84939887 has 2 divisors, whose sum is σ = 84939888. Its totient is φ = 84939886.

The previous prime is 84939859. The next prime is 84939923. The reversal of 84939887 is 78893948.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84939887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84939817) 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, 42469943 + 42469944.

It is an arithmetic number, because the mean of its divisors is an integer number (42469944).

Almost surely, 2^84939887 is an apocalyptic number.

84939887 is a deficient number, since it is larger than the sum of its proper divisors (1).

84939887 is an equidigital number, since it uses as much as digits as its factorization.

84939887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 84939887 is about 9216.2837955436. The cubic root of 84939887 is about 439.5792931164.

The spelling of 84939887 in words is "eighty-four million, nine hundred thirty-nine thousand, eight hundred eighty-seven".