84285857 has 2 divisors, whose sum is σ = 84285858. Its totient is φ = 84285856.

The previous prime is 84285809. The next prime is 84285863. The reversal of 84285857 is 75858248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 215296 = 9169^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 84285857 - 2¹⁰ = 84284833 is a prime.

It is not a weakly prime, because it can be changed into another prime (84285557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42142928 + 42142929.

It is an arithmetic number, because the mean of its divisors is an integer number (42142929).

Almost surely, 2^84285857 is an apocalyptic number.

It is an amenable number.

84285857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84285857 is an equidigital number, since it uses as much as digits as its factorization.

84285857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 716800, while the sum is 47.

The square root of 84285857 is about 9180.7329228118. The cubic root of 84285857 is about 438.4481436580.

It can be divided in two parts, 8428585 and 7, that multiplied together give a palindrome (59000095).

The spelling of 84285857 in words is "eighty-four million, two hundred eighty-five thousand, eight hundred fifty-seven".