85794221 has 2 divisors, whose sum is σ = 85794222. Its totient is φ = 85794220.

The previous prime is 85794217. The next prime is 85794229. The reversal of 85794221 is 12249758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 25110121 = 7790^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 85794221 - 2² = 85794217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85794229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42897110 + 42897111.

It is an arithmetic number, because the mean of its divisors is an integer number (42897111).

Almost surely, 2^85794221 is an apocalyptic number.

It is an amenable number.

85794221 is a deficient number, since it is larger than the sum of its proper divisors (1).

85794221 is an equidigital number, since it uses as much as digits as its factorization.

85794221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 85794221 is about 9262.5169905377. The cubic root of 85794221 is about 441.0481571151.

The spelling of 85794221 in words is "eighty-five million, seven hundred ninety-four thousand, two hundred twenty-one".