630557 has 4 divisors (see below), whose sum is σ = 640956. Its totient is φ = 620160.

The previous prime is 630529. The next prime is 630559. The reversal of 630557 is 755036.

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 23716 + 606841 = 154^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 630557 - 2⁶ = 630493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630559) 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, 5108 + ... + 5229.

It is an arithmetic number, because the mean of its divisors is an integer number (160239).

2⁶³⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

630557 is a deficient number, since it is larger than the sum of its proper divisors (10399).

630557 is a wasteful number, since it uses less digits than its factorization.

630557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10398.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 630557 is about 794.0761928178. The cubic root of 630557 is about 85.7514456601.

The spelling of 630557 in words is "six hundred thirty thousand, five hundred fifty-seven".