85648489 has 2 divisors, whose sum is σ = 85648490. Its totient is φ = 85648488.

The previous prime is 85648469. The next prime is 85648501. The reversal of 85648489 is 98484658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84492864 + 1155625 = 9192^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 85648489 - 2¹⁷ = 85517417 is a prime.

It is not a weakly prime, because it can be changed into another prime (85648469) 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, 42824244 + 42824245.

It is an arithmetic number, because the mean of its divisors is an integer number (42824245).

Almost surely, 2^85648489 is an apocalyptic number.

It is an amenable number.

85648489 is a deficient number, since it is larger than the sum of its proper divisors (1).

85648489 is an equidigital number, since it uses as much as digits as its factorization.

85648489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 52.

The square root of 85648489 is about 9254.6468868347. The cubic root of 85648489 is about 440.7982908010.

The spelling of 85648489 in words is "eighty-five million, six hundred forty-eight thousand, four hundred eighty-nine".