630641 has 4 divisors (see below), whose sum is σ = 687984. Its totient is φ = 573300.

The previous prime is 630613. The next prime is 630659. The reversal of 630641 is 146036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630641 - 2⁶ = 630577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (630841) 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, 28655 + ... + 28676.

It is an arithmetic number, because the mean of its divisors is an integer number (171996).

2⁶³⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

630641 is a deficient number, since it is larger than the sum of its proper divisors (57343).

630641 is a wasteful number, since it uses less digits than its factorization.

630641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57342.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 630641 is about 794.1290827063. The cubic root of 630641 is about 85.7552532998.

Adding to 630641 its reverse (146036), we get a palindrome (776677).

The spelling of 630641 in words is "six hundred thirty thousand, six hundred forty-one".