85969843 has 2 divisors, whose sum is σ = 85969844. Its totient is φ = 85969842.

The previous prime is 85969831. The next prime is 85969847. The reversal of 85969843 is 34896958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85969843 - 2⁵ = 85969811 is a prime.

It is a super-3 number, since 3×85969843³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (85969847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42984921 + 42984922.

It is an arithmetic number, because the mean of its divisors is an integer number (42984922).

Almost surely, 2^85969843 is an apocalyptic number.

85969843 is a deficient number, since it is larger than the sum of its proper divisors (1).

85969843 is an equidigital number, since it uses as much as digits as its factorization.

85969843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 85969843 is about 9271.9923964593. The cubic root of 85969843 is about 441.3488959690.

The spelling of 85969843 in words is "eighty-five million, nine hundred sixty-nine thousand, eight hundred forty-three".