85485643 has 2 divisors, whose sum is σ = 85485644. Its totient is φ = 85485642.

The previous prime is 85485629. The next prime is 85485689. The reversal of 85485643 is 34658458.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85485643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85485643.

It is not a weakly prime, because it can be changed into another prime (85485623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42742821 + 42742822.

It is an arithmetic number, because the mean of its divisors is an integer number (42742822).

Almost surely, 2^85485643 is an apocalyptic number.

85485643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85485643 is an equidigital number, since it uses as much as digits as its factorization.

85485643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 43.

The square root of 85485643 is about 9245.8446342127. The cubic root of 85485643 is about 440.5187459571.

The spelling of 85485643 in words is "eighty-five million, four hundred eighty-five thousand, six hundred forty-three".