85844653 has 2 divisors, whose sum is σ = 85844654. Its totient is φ = 85844652.

The previous prime is 85844651. The next prime is 85844687. The reversal of 85844653 is 35644858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77475204 + 8369449 = 8802^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 85844653 - 2¹ = 85844651 is a prime.

Together with 85844651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85844651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42922326 + 42922327.

It is an arithmetic number, because the mean of its divisors is an integer number (42922327).

Almost surely, 2^85844653 is an apocalyptic number.

It is an amenable number.

85844653 is a deficient number, since it is larger than the sum of its proper divisors (1).

85844653 is an equidigital number, since it uses as much as digits as its factorization.

85844653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 43.

The square root of 85844653 is about 9265.2389607608. The cubic root of 85844653 is about 441.1345599190.

The spelling of 85844653 in words is "eighty-five million, eight hundred forty-four thousand, six hundred fifty-three".