84065857 has 2 divisors, whose sum is σ = 84065858. Its totient is φ = 84065856.

The previous prime is 84065843. The next prime is 84065881. The reversal of 84065857 is 75856048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 21196816 = 7929^2 + 4604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84065857 is a prime.

It is a super-3 number, since 3×84065857³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (84065837) 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, 42032928 + 42032929.

It is an arithmetic number, because the mean of its divisors is an integer number (42032929).

Almost surely, 2^84065857 is an apocalyptic number.

It is an amenable number.

84065857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84065857 is an equidigital number, since it uses as much as digits as its factorization.

84065857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 84065857 is about 9168.7434798886. The cubic root of 84065857 is about 438.0663372624.

The spelling of 84065857 in words is "eighty-four million, sixty-five thousand, eight hundred fifty-seven".