659489 has 4 divisors (see below), whose sum is σ = 682260. Its totient is φ = 636720.

The previous prime is 659473. The next prime is 659497. The reversal of 659489 is 984956.

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 180625 + 478864 = 425^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 659489 - 2⁴ = 659473 is a prime.

It is a super-2 number, since 2×659489² = 869851482242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11342 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (170565).

2⁶⁵⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

659489 is a deficient number, since it is larger than the sum of its proper divisors (22771).

659489 is a wasteful number, since it uses less digits than its factorization.

659489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22770.

The product of its digits is 77760, while the sum is 41.

The square root of 659489 is about 812.0892808060. The cubic root of 659489 is about 87.0434010783.

It can be divided in two parts, 6 and 59489, that added together give a palindrome (59495).

The spelling of 659489 in words is "six hundred fifty-nine thousand, four hundred eighty-nine".