84575857 has 2 divisors, whose sum is σ = 84575858. Its totient is φ = 84575856.

The previous prime is 84575849. The next prime is 84575893. The reversal of 84575857 is 75857548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64064016 + 20511841 = 8004^2 + 4529^2 .

It is a cyclic number.

It is not a de Polignac number, because 84575857 - 2³ = 84575849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84575857.

It is not a weakly prime, because it can be changed into another prime (84579857) 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, 42287928 + 42287929.

It is an arithmetic number, because the mean of its divisors is an integer number (42287929).

Almost surely, 2^84575857 is an apocalyptic number.

It is an amenable number.

84575857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84575857 is an equidigital number, since it uses as much as digits as its factorization.

84575857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568000, while the sum is 49.

The square root of 84575857 is about 9196.5133066831. The cubic root of 84575857 is about 438.9504201457.

The spelling of 84575857 in words is "eighty-four million, five hundred seventy-five thousand, eight hundred fifty-seven".