84659857 has 2 divisors, whose sum is σ = 84659858. Its totient is φ = 84659856.

The previous prime is 84659837. The next prime is 84659873. The reversal of 84659857 is 75895648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79637776 + 5022081 = 8924^2 + 2241^2 .

It is a cyclic number.

It is not a de Polignac number, because 84659857 - 2¹⁵ = 84627089 is a prime.

It is not a weakly prime, because it can be changed into another prime (84659807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42329928 + 42329929.

It is an arithmetic number, because the mean of its divisors is an integer number (42329929).

Almost surely, 2^84659857 is an apocalyptic number.

It is an amenable number.

84659857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84659857 is an equidigital number, since it uses as much as digits as its factorization.

84659857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The square root of 84659857 is about 9201.0791214944. The cubic root of 84659857 is about 439.0956926321.

The spelling of 84659857 in words is "eighty-four million, six hundred fifty-nine thousand, eight hundred fifty-seven".