630569 has 4 divisors (see below), whose sum is σ = 632580. Its totient is φ = 628560.

The previous prime is 630559. The next prime is 630577. The reversal of 630569 is 965036.

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 316969 + 313600 = 563^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630569 is a prime.

It is a super-2 number, since 2×630569² = 795234527522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (158145).

2⁶³⁰⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

630569 is a deficient number, since it is larger than the sum of its proper divisors (2011).

630569 is a wasteful number, since it uses less digits than its factorization.

630569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 630569 is about 794.0837487318. The cubic root of 630569 is about 85.7519896293.

The spelling of 630569 in words is "six hundred thirty thousand, five hundred sixty-nine".