84508859 has 2 divisors, whose sum is σ = 84508860. Its totient is φ = 84508858.

The previous prime is 84508849. The next prime is 84508873. The reversal of 84508859 is 95880548.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84508859 is a prime.

It is not a weakly prime, because it can be changed into another prime (84508829) 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, 42254429 + 42254430.

It is an arithmetic number, because the mean of its divisors is an integer number (42254430).

Almost surely, 2^84508859 is an apocalyptic number.

84508859 is a deficient number, since it is larger than the sum of its proper divisors (1).

84508859 is an equidigital number, since it uses as much as digits as its factorization.

84508859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 47.

The square root of 84508859 is about 9192.8700088710. The cubic root of 84508859 is about 438.8344825317.

The spelling of 84508859 in words is "eighty-four million, five hundred eight thousand, eight hundred fifty-nine".