630509 has 12 divisors (see below), whose sum is σ = 726912. Its totient is φ = 541800.

The previous prime is 630493. The next prime is 630521. The reversal of 630509 is 905036.

It is not a de Polignac number, because 630509 - 2⁴ = 630493 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630529) 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 11 ways as a sum of consecutive naturals, for example, 14642 + ... + 14684.

It is an arithmetic number, because the mean of its divisors is an integer number (60576).

2⁶³⁰⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

630509 is a deficient number, since it is larger than the sum of its proper divisors (96403).

630509 is a wasteful number, since it uses less digits than its factorization.

630509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 630509 is about 794.0459684426. The cubic root of 630509 is about 85.7492697142.

The spelling of 630509 in words is "six hundred thirty thousand, five hundred nine".