630687 has 4 divisors (see below), whose sum is σ = 840920. Its totient is φ = 420456.

The previous prime is 630677. The next prime is 630689. The reversal of 630687 is 786036.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 630687 - 2⁷ = 630559 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 630687.

It is not an unprimeable number, because it can be changed into a prime (630689) 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, 105112 + ... + 105117.

It is an arithmetic number, because the mean of its divisors is an integer number (210230).

2⁶³⁰⁶⁸⁷ is an apocalyptic number.

630687 is a deficient number, since it is larger than the sum of its proper divisors (210233).

630687 is a wasteful number, since it uses less digits than its factorization.

630687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210232.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 630687 is about 794.1580447241. The cubic root of 630687 is about 85.7573382926.

The spelling of 630687 in words is "six hundred thirty thousand, six hundred eighty-seven".