654489 has 18 divisors (see below), whose sum is σ = 1040858. Its totient is φ = 396000.

The previous prime is 654439. The next prime is 654491. The reversal of 654489 is 984456.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 27225 = 792^2 + 165^2 .

It is not a de Polignac number, because 654489 - 2⁸ = 654233 is a prime.

It is a super-2 number, since 2×654489² = 856711702242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654439) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 789 + ... + 1389.

2⁶⁵⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

654489 is a deficient number, since it is larger than the sum of its proper divisors (386369).

654489 is a wasteful number, since it uses less digits than its factorization.

654489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 615 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 654489 is about 809.0049443607. The cubic root of 654489 is about 86.8228659134.

It can be divided in two parts, 65 and 4489, that added together give a palindrome (4554).

The spelling of 654489 in words is "six hundred fifty-four thousand, four hundred eighty-nine".