683947988 has 6 divisors (see below), whose sum is σ = 1196908986. Its totient is φ = 341973992.

The previous prime is 683947939. The next prime is 683948003. The reversal of 683947988 is 889749386.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 422220304 + 261727684 = 20548^2 + 16178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 683947988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85493495 + ... + 85493502.

It is an arithmetic number, because the mean of its divisors is an integer number (199484831).

Almost surely, 2^683947988 is an apocalyptic number.

It is an amenable number.

683947988 is a deficient number, since it is larger than the sum of its proper divisors (512960998).

683947988 is a wasteful number, since it uses less digits than its factorization.

683947988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170987001 (or 170986999 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 62.

The square root of 683947988 is about 26152.3992780777. The cubic root of 683947988 is about 881.0644780364.

The spelling of 683947988 in words is "six hundred eighty-three million, nine hundred forty-seven thousand, nine hundred eighty-eight".