85489 has 4 divisors (see below), whose sum is σ = 87156. Its totient is φ = 83824.

The previous prime is 85487. The next prime is 85513. The reversal of 85489 is 98458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57600 + 27889 = 240^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 85489 - 2¹ = 85487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (21789).

It is a Poulet number, since it divides 2⁸⁵⁴⁸⁸-1.

2⁸⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

85489 is a deficient number, since it is larger than the sum of its proper divisors (1667).

85489 is a wasteful number, since it uses less digits than its factorization.

85489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666.

The product of its digits is 11520, while the sum is 34.

The square root of 85489 is about 292.3850201361. The cubic root of 85489 is about 44.0524512236.

The spelling of 85489 in words is "eighty-five thousand, four hundred eighty-nine".