684980996 has 18 divisors (see below), whose sum is σ = 1394425998. Its totient is φ = 293563200.

The previous prime is 684980987. The next prime is 684981007. The reversal of 684980996 is 699089486.

684980996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 383611396 + 301369600 = 19586^2 + 17360^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1747205 + ... + 1747596.

It is an arithmetic number, because the mean of its divisors is an integer number (77468111).

Almost surely, 2^684980996 is an apocalyptic number.

It is an amenable number.

684980996 is an abundant number, since it is smaller than the sum of its proper divisors (709445002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684980996 is a wasteful number, since it uses less digits than its factorization.

684980996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494819 (or 3494810 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 59.

The square root of 684980996 is about 26172.1416013287. The cubic root of 684980996 is about 881.5078298886.

The spelling of 684980996 in words is "six hundred eighty-four million, nine hundred eighty thousand, nine hundred ninety-six".