609646 has 8 divisors (see below), whose sum is σ = 944064. Its totient is φ = 294960.

The previous prime is 609641. The next prime is 609673. The reversal of 609646 is 646906.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609641) 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 3 ways as a sum of consecutive naturals, for example, 4855 + ... + 4978.

It is an arithmetic number, because the mean of its divisors is an integer number (118008).

2⁶⁰⁹⁶⁴⁶ is an apocalyptic number.

609646 is a deficient number, since it is larger than the sum of its proper divisors (334418).

609646 is a wasteful number, since it uses less digits than its factorization.

609646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9866.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 609646 is about 780.7983094244. The cubic root of 609646 is about 84.7928519844.

The spelling of 609646 in words is "six hundred nine thousand, six hundred forty-six".