654789 has 16 divisors (see below), whose sum is σ = 952128. Its totient is φ = 398592.

The previous prime is 654781. The next prime is 654799. The reversal of 654789 is 987456.

It is not a de Polignac number, because 654789 - 2³ = 654781 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 654789.

It is not an unprimeable number, because it can be changed into a prime (654781) 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, 1714 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (59508).

2⁶⁵⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

654789 is a deficient number, since it is larger than the sum of its proper divisors (297339).

654789 is a wasteful number, since it uses less digits than its factorization.

654789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its digits is 60480, while the sum is 39.

The square root of 654789 is about 809.1903360767. The cubic root of 654789 is about 86.8361296357.

The spelling of 654789 in words is "six hundred fifty-four thousand, seven hundred eighty-nine".