630449 has 4 divisors (see below), whose sum is σ = 632100. Its totient is φ = 628800.

The previous prime is 630433. The next prime is 630451. The reversal of 630449 is 944036.

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 552049 + 78400 = 743^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 630449 - 2⁴ = 630433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630349) 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, 77 + ... + 1125.

It is an arithmetic number, because the mean of its divisors is an integer number (158025).

2⁶³⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

630449 is a deficient number, since it is larger than the sum of its proper divisors (1651).

630449 is a wasteful number, since it uses less digits than its factorization.

630449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 630449 is about 794.0081863558. The cubic root of 630449 is about 85.7465496264.

The spelling of 630449 in words is "six hundred thirty thousand, four hundred forty-nine".