85318643 has 2 divisors, whose sum is σ = 85318644. Its totient is φ = 85318642.

The previous prime is 85318637. The next prime is 85318669. The reversal of 85318643 is 34681358.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85318643 is a prime.

It is a super-2 number, since 2×85318643² = 14558541686722898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85318597 and 85318606.

It is not a weakly prime, because it can be changed into another prime (85318943) 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, 42659321 + 42659322.

It is an arithmetic number, because the mean of its divisors is an integer number (42659322).

Almost surely, 2^85318643 is an apocalyptic number.

85318643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85318643 is an equidigital number, since it uses as much as digits as its factorization.

85318643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 85318643 is about 9236.8091351938. The cubic root of 85318643 is about 440.2317013132.

The spelling of 85318643 in words is "eighty-five million, three hundred eighteen thousand, six hundred forty-three".