630189 has 18 divisors (see below), whose sum is σ = 1059630. Its totient is φ = 359856.

The previous prime is 630181. The next prime is 630193. The reversal of 630189 is 981036.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 233289 = 630^2 + 483^2 .

It is not a de Polignac number, because 630189 - 2³ = 630181 is a prime.

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

630189 is a modest number, since divided by 189 gives 63 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630181) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 274 + ... + 1155.

2⁶³⁰¹⁸⁹ is an apocalyptic number.

It is an amenable number.

630189 is a deficient number, since it is larger than the sum of its proper divisors (429441).

630189 is a wasteful number, since it uses less digits than its factorization.

630189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 630189 is about 793.8444432003. The cubic root of 630189 is about 85.7347605849.

The spelling of 630189 in words is "six hundred thirty thousand, one hundred eighty-nine".