630653 has 4 divisors (see below), whose sum is σ = 636348. Its totient is φ = 624960.

The previous prime is 630613. The next prime is 630659. The reversal of 630653 is 356036.

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 80089 + 550564 = 283^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 630653 - 2⁶ = 630589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630659) 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, 2678 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (159087).

2⁶³⁰⁶⁵³ is an apocalyptic number.

It is an amenable number.

630653 is a deficient number, since it is larger than the sum of its proper divisors (5695).

630653 is a wasteful number, since it uses less digits than its factorization.

630653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 630653 is about 794.1366381171. The cubic root of 630653 is about 85.7557972207.

Adding to 630653 its reverse (356036), we get a palindrome (986689).

The spelling of 630653 in words is "six hundred thirty thousand, six hundred fifty-three".