85968221 has 2 divisors, whose sum is σ = 85968222. Its totient is φ = 85968220.

The previous prime is 85968193. The next prime is 85968257. The reversal of 85968221 is 12286958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 17724100 = 8261^2 + 4210^2 .

It is a cyclic number.

It is not a de Polignac number, because 85968221 - 2¹⁰ = 85967197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85968121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42984110 + 42984111.

It is an arithmetic number, because the mean of its divisors is an integer number (42984111).

Almost surely, 2^85968221 is an apocalyptic number.

It is an amenable number.

85968221 is a deficient number, since it is larger than the sum of its proper divisors (1).

85968221 is an equidigital number, since it uses as much as digits as its factorization.

85968221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 85968221 is about 9271.9049283305. The cubic root of 85968221 is about 441.3461202964.

The spelling of 85968221 in words is "eighty-five million, nine hundred sixty-eight thousand, two hundred twenty-one".