630205 has 4 divisors (see below), whose sum is σ = 756252. Its totient is φ = 504160.

The previous prime is 630197. The next prime is 630229. The reversal of 630205 is 502036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 498436 + 131769 = 706^2 + 363^2 .

It is not a de Polignac number, because 630205 - 2³ = 630197 is a prime.

It is a Duffinian number.

630205 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63016 + ... + 63025.

It is an arithmetic number, because the mean of its divisors is an integer number (189063).

2⁶³⁰²⁰⁵ is an apocalyptic number.

It is an amenable number.

630205 is a deficient number, since it is larger than the sum of its proper divisors (126047).

630205 is a wasteful number, since it uses less digits than its factorization.

630205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126046.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 630205 is about 793.8545206774. The cubic root of 630205 is about 85.7354861580.

The spelling of 630205 in words is "six hundred thirty thousand, two hundred five".