630708979 has 4 divisors (see below), whose sum is σ = 633107376. Its totient is φ = 628310584.

The previous prime is 630708937. The next prime is 630709007. The reversal of 630708979 is 979807036.

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

It is a cyclic number.

It is not a de Polignac number, because 630708979 - 2¹¹ = 630706931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630700979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198804 + ... + 1199329.

It is an arithmetic number, because the mean of its divisors is an integer number (158276844).

Almost surely, 2^630708979 is an apocalyptic number.

630708979 is a deficient number, since it is larger than the sum of its proper divisors (2398397).

630708979 is a wasteful number, since it uses less digits than its factorization.

630708979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398396.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 630708979 is about 25113.9200245601. The cubic root of 630708979 is about 857.5833447537.

The spelling of 630708979 in words is "six hundred thirty million, seven hundred eight thousand, nine hundred seventy-nine".