630679 has 12 divisors (see below), whose sum is σ = 749208. Its totient is φ = 529200.

The previous prime is 630677. The next prime is 630689. The reversal of 630679 is 976036.

It is not a de Polignac number, because 630679 - 2¹ = 630677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2884 + ... + 3094.

It is an arithmetic number, because the mean of its divisors is an integer number (62434).

2⁶³⁰⁶⁷⁹ is an apocalyptic number.

630679 is a deficient number, since it is larger than the sum of its proper divisors (118529).

630679 is a wasteful number, since it uses less digits than its factorization.

630679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 630679 is about 794.1530079273. The cubic root of 630679 is about 85.7569756924.

The spelling of 630679 in words is "six hundred thirty thousand, six hundred seventy-nine".