654609 has 8 divisors (see below), whose sum is σ = 880992. Its totient is φ = 432320.

The previous prime is 654601. The next prime is 654611. The reversal of 654609 is 906456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 654609 - 2³ = 654601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (654601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (110124).

2⁶⁵⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

654609 is a deficient number, since it is larger than the sum of its proper divisors (226383).

654609 is a wasteful number, since it uses less digits than its factorization.

654609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 654609 is about 809.0791061448. The cubic root of 654609 is about 86.8281718886.

It can be divided in two parts, 6 and 54609, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 654609 in words is "six hundred fifty-four thousand, six hundred nine".