630562321 has 3 divisors (see below), whose sum is σ = 630587433. Its totient is φ = 630537210.

The previous prime is 630562297. The next prime is 630562357. The reversal of 630562321 is 123265036.

The square root of 630562321 is 25111.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 630562321 - 2¹⁹ = 630038033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630562321.

It is not an unprimeable number, because it can be changed into a prime (630568321) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12556 + ... + 37666.

It is an arithmetic number, because the mean of its divisors is an integer number (210195811).

Almost surely, 2^630562321 is an apocalyptic number.

630562321 is the 25111-st square number.

630562321 is the 12556-th centered octagonal number.

It is an amenable number.

630562321 is a deficient number, since it is larger than the sum of its proper divisors (25112).

630562321 is an frugal number, since it uses more digits than its factorization.

630562321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50222 (or 25111 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The cubic root of 630562321 is about 857.5168686598.

The spelling of 630562321 in words is "six hundred thirty million, five hundred sixty-two thousand, three hundred twenty-one".