985289 has 4 divisors (see below), whose sum is σ = 989124. Its totient is φ = 981456.

The previous prime is 985279. The next prime is 985291. The reversal of 985289 is 982589.

It is a happy number.

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 144400 + 840889 = 380^2 + 917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985219) 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, 1502 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (247281).

2⁹⁸⁵²⁸⁹ is an apocalyptic number.

It is an amenable number.

985289 is a deficient number, since it is larger than the sum of its proper divisors (3835).

985289 is a wasteful number, since it uses less digits than its factorization.

985289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834.

The product of its digits is 51840, while the sum is 41.

The square root of 985289 is about 992.6172474826. The cubic root of 985289 is about 99.5072088916.

The spelling of 985289 in words is "nine hundred eighty-five thousand, two hundred eighty-nine".