630953 has 4 divisors (see below), whose sum is σ = 652740. Its totient is φ = 609168.

The previous prime is 630941. The next prime is 630967. The reversal of 630953 is 359036.

630953 is nontrivially palindromic in base 16.

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 473344 + 157609 = 688^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 630953 - 2¹⁰ = 629929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630353) 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, 10850 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (163185).

2⁶³⁰⁹⁵³ is an apocalyptic number.

It is an amenable number.

630953 is a deficient number, since it is larger than the sum of its proper divisors (21787).

630953 is a wasteful number, since it uses less digits than its factorization.

630953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21786.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 630953 is about 794.3255000313. The cubic root of 630953 is about 85.7693930021.

Adding to 630953 its reverse (359036), we get a palindrome (989989).

The spelling of 630953 in words is "six hundred thirty thousand, nine hundred fifty-three".