683637725 has 24 divisors (see below), whose sum is σ = 866361960. Its totient is φ = 534942720.

The previous prime is 683637719. The next prime is 683637739. The reversal of 683637725 is 527736386.

It can be written as a sum of positive squares in 12 ways, for example, as 135047641 + 548590084 = 11621^2 + 23422^2 .

It is not a de Polignac number, because 683637725 - 2⁸ = 683637469 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 683637725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604961 + ... + 606089.

It is an arithmetic number, because the mean of its divisors is an integer number (36098415).

Almost surely, 2^683637725 is an apocalyptic number.

It is an amenable number.

683637725 is a deficient number, since it is larger than the sum of its proper divisors (182724235).

683637725 is a wasteful number, since it uses less digits than its factorization.

683637725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1644 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 683637725 is about 26146.4667785152. The cubic root of 683637725 is about 880.9312305484.

The spelling of 683637725 in words is "six hundred eighty-three million, six hundred thirty-seven thousand, seven hundred twenty-five".