630005 has 4 divisors (see below), whose sum is σ = 756012. Its totient is φ = 504000.

The previous prime is 629989. The next prime is 630017. The reversal of 630005 is 500036.

It is a happy number.

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 253009 + 376996 = 503^2 + 614^2 .

It is not a de Polignac number, because 630005 - 2⁴ = 629989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62996 + ... + 63005.

It is an arithmetic number, because the mean of its divisors is an integer number (189003).

2⁶³⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

630005 is a deficient number, since it is larger than the sum of its proper divisors (126007).

630005 is a wasteful number, since it uses less digits than its factorization.

630005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126006.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 630005 is about 793.7285430171. The cubic root of 630005 is about 85.7264156114.

The spelling of 630005 in words is "six hundred thirty thousand, five".