805858541 has 2 divisors, whose sum is σ = 805858542. Its totient is φ = 805858540.

The previous prime is 805858519. The next prime is 805858579. The reversal of 805858541 is 145858508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529966441 + 275892100 = 23021^2 + 16610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805858541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 805858492 and 805858501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805858241) 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, 402929270 + 402929271.

It is an arithmetic number, because the mean of its divisors is an integer number (402929271).

Almost surely, 2^805858541 is an apocalyptic number.

It is an amenable number.

805858541 is a deficient number, since it is larger than the sum of its proper divisors (1).

805858541 is an equidigital number, since it uses as much as digits as its factorization.

805858541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256000, while the sum is 44.

The square root of 805858541 is about 28387.6476834556. The cubic root of 805858541 is about 930.5783356955.

The spelling of 805858541 in words is "eight hundred five million, eight hundred fifty-eight thousand, five hundred forty-one".