85810841 has 2 divisors, whose sum is σ = 85810842. Its totient is φ = 85810840.

The previous prime is 85810831. The next prime is 85810867. The reversal of 85810841 is 14801858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76930441 + 8880400 = 8771^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 85810841 - 2¹⁰ = 85809817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (85810811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905420 + 42905421.

It is an arithmetic number, because the mean of its divisors is an integer number (42905421).

Almost surely, 2^85810841 is an apocalyptic number.

It is an amenable number.

85810841 is a deficient number, since it is larger than the sum of its proper divisors (1).

85810841 is an equidigital number, since it uses as much as digits as its factorization.

85810841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 85810841 is about 9263.4141114386. The cubic root of 85810841 is about 441.0766351291.

The spelling of 85810841 in words is "eighty-five million, eight hundred ten thousand, eight hundred forty-one".