85805543 has 2 divisors, whose sum is σ = 85805544. Its totient is φ = 85805542.

The previous prime is 85805527. The next prime is 85805549. The reversal of 85805543 is 34550858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85805543 - 2⁴ = 85805527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85805497 and 85805506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85805549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42902771 + 42902772.

It is an arithmetic number, because the mean of its divisors is an integer number (42902772).

Almost surely, 2^85805543 is an apocalyptic number.

85805543 is a deficient number, since it is larger than the sum of its proper divisors (1).

85805543 is an equidigital number, since it uses as much as digits as its factorization.

85805543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 85805543 is about 9263.1281433434. The cubic root of 85805543 is about 441.0675575189.

The spelling of 85805543 in words is "eighty-five million, eight hundred five thousand, five hundred forty-three".