654439689 has 16 divisors (see below), whose sum is σ = 971766400. Its totient is φ = 435291408.

The previous prime is 654439679. The next prime is 654439693. The reversal of 654439689 is 986934456.

654439689 is a `hidden beast` number, since 6 + 544 + 3 + 96 + 8 + 9 = 666.

It is not a de Polignac number, because 654439689 - 2⁵ = 654439657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654439679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15754 + ... + 39459.

It is an arithmetic number, because the mean of its divisors is an integer number (60735400).

Almost surely, 2^654439689 is an apocalyptic number.

It is an amenable number.

654439689 is a deficient number, since it is larger than the sum of its proper divisors (317326711).

654439689 is a wasteful number, since it uses less digits than its factorization.

654439689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55661 (or 55655 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 654439689 is about 25582.0188609109. The cubic root of 654439689 is about 868.2068536752.

The spelling of 654439689 in words is "six hundred fifty-four million, four hundred thirty-nine thousand, six hundred eighty-nine".