630609 has 8 divisors (see below), whose sum is σ = 960960. Its totient is φ = 360336.

The previous prime is 630607. The next prime is 630613. The reversal of 630609 is 906036.

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

It is not a de Polignac number, because 630609 - 2¹ = 630607 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

630609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (630607) 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, 14994 + ... + 15035.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2⁶³⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

630609 is a deficient number, since it is larger than the sum of its proper divisors (330351).

630609 is a wasteful number, since it uses less digits than its factorization.

630609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30039.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 630609 is about 794.1089345927. The cubic root of 630609 is about 85.7538028103.

The spelling of 630609 in words is "six hundred thirty thousand, six hundred nine".