630623 has 4 divisors (see below), whose sum is σ = 720720. Its totient is φ = 540528.

The previous prime is 630613. The next prime is 630659. The reversal of 630623 is 326036.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 630623 - 2⁴ = 630607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 630595 and 630604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45038 + ... + 45051.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2⁶³⁰⁶²³ is an apocalyptic number.

630623 is a deficient number, since it is larger than the sum of its proper divisors (90097).

630623 is an equidigital number, since it uses as much as digits as its factorization.

630623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90096.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 630623 is about 794.1177494553. The cubic root of 630623 is about 85.7544374055.

Adding to 630623 its reverse (326036), we get a palindrome (956659).

The spelling of 630623 in words is "six hundred thirty thousand, six hundred twenty-three".