630779 has 4 divisors (see below), whose sum is σ = 652560. Its totient is φ = 609000.

The previous prime is 630737. The next prime is 630797. The reversal of 630779 is 977036.

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

It is not a de Polignac number, because 630779 - 2⁸ = 630523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630709) 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, 10847 + ... + 10904.

It is an arithmetic number, because the mean of its divisors is an integer number (163140).

2⁶³⁰⁷⁷⁹ is an apocalyptic number.

630779 is a deficient number, since it is larger than the sum of its proper divisors (21781).

630779 is a wasteful number, since it uses less digits than its factorization.

630779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21780.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 630779 is about 794.2159655912. The cubic root of 630779 is about 85.7615079739.

The spelling of 630779 in words is "six hundred thirty thousand, seven hundred seventy-nine".